1053440197 has 4 divisors (see below), whose sum is σ = 1053519136. Its totient is φ = 1053361260.

The previous prime is 1053440191. The next prime is 1053440203. The reversal of 1053440197 is 7910443501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7910443501 = 5501 ⋅1438001.

It is an interprime number because it is at equal distance from previous prime (1053440191) and next prime (1053440203).

It is a cyclic number.

It is not a de Polignac number, because 1053440197 - 2¹⁹ = 1052915909 is a prime.

It is a super-2 number, since 2×1053440197² = 2219472497310797618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053440191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13953 + ... + 47974.

It is an arithmetic number, because the mean of its divisors is an integer number (263379784).

Almost surely, 2^1053440197 is an apocalyptic number.

It is an amenable number.

1053440197 is a deficient number, since it is larger than the sum of its proper divisors (78939).

1053440197 is an equidigital number, since it uses as much as digits as its factorization.

1053440197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78938.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1053440197 is about 32456.7434749699. The cubic root of 1053440197 is about 1017.5051796407.

Adding to 1053440197 its reverse (7910443501), we get a palindrome (8963883698).

The spelling of 1053440197 in words is "one billion, fifty-three million, four hundred forty thousand, one hundred ninety-seven".