1057904197 has 4 divisors (see below), whose sum is σ = 1209033376. Its totient is φ = 906775020.

The previous prime is 1057904191. The next prime is 1057904207. The reversal of 1057904197 is 7914097501.

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 an emirpimes, since its reverse is a distinct semiprime: 7914097501 = 101 ⋅78357401.

It is a cyclic number.

It is not a de Polignac number, because 1057904197 - 2¹⁵ = 1057871429 is a prime.

It is a super-2 number, since 2×1057904197² = 2238322580060429618, 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 (1057904191) 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, 75564579 + ... + 75564592.

It is an arithmetic number, because the mean of its divisors is an integer number (302258344).

Almost surely, 2^1057904197 is an apocalyptic number.

It is an amenable number.

1057904197 is a deficient number, since it is larger than the sum of its proper divisors (151129179).

1057904197 is an equidigital number, since it uses as much as digits as its factorization.

1057904197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151129178.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 1057904197 is about 32525.4392283947. The cubic root of 1057904197 is about 1018.9403955335.

The spelling of 1057904197 in words is "one billion, fifty-seven million, nine hundred four thousand, one hundred ninety-seven".