802564957 has 4 divisors (see below), whose sum is σ = 803040700. Its totient is φ = 802089216.

The previous prime is 802564913. The next prime is 802564969. The reversal of 802564957 is 759465208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105288121 + 697276836 = 10261^2 + 26406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802564957 is a prime.

It is a super-2 number, since 2×802564957² = 1288221020408823698, 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 (802564457) 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, 235332 + ... + 238717.

It is an arithmetic number, because the mean of its divisors is an integer number (200760175).

Almost surely, 2^802564957 is an apocalyptic number.

It is an amenable number.

802564957 is a deficient number, since it is larger than the sum of its proper divisors (475743).

802564957 is a wasteful number, since it uses less digits than its factorization.

802564957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475742.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 802564957 is about 28329.5774236045. The cubic root of 802564957 is about 929.3088312743.

The spelling of 802564957 in words is "eight hundred two million, five hundred sixty-four thousand, nine hundred fifty-seven".