1063640897 has 4 divisors (see below), whose sum is σ = 1160335536. Its totient is φ = 966946260.

The previous prime is 1063640827. The next prime is 1063640909. The reversal of 1063640897 is 7980463601.

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: 7980463601 = 11 ⋅725496691.

It is a cyclic number.

It is not a de Polignac number, because 1063640897 - 2¹⁸ = 1063378753 is a prime.

It is a super-2 number, since 2×1063640897² = 2262663915541929218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1063640807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48347303 + ... + 48347324.

It is an arithmetic number, because the mean of its divisors is an integer number (290083884).

Almost surely, 2^1063640897 is an apocalyptic number.

It is an amenable number.

1063640897 is a deficient number, since it is larger than the sum of its proper divisors (96694639).

1063640897 is an equidigital number, since it uses as much as digits as its factorization.

1063640897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96694638.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1063640897 is about 32613.5078916697. The cubic root of 1063640897 is about 1020.7788799712.

The spelling of 1063640897 in words is "one billion, sixty-three million, six hundred forty thousand, eight hundred ninety-seven".