8693947957 has 4 divisors (see below), whose sum is σ = 8836471756. Its totient is φ = 8551424160.

The previous prime is 8693947931. The next prime is 8693947973. The reversal of 8693947957 is 7597493968.

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 644448996 + 8049498961 = 25386^2 + 89719^2 .

It is a cyclic number.

It is not a de Polignac number, because 8693947957 - 2²⁷ = 8559730229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8693947892 and 8693947901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8693947057) 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, 71261808 + ... + 71261929.

It is an arithmetic number, because the mean of its divisors is an integer number (2209117939).

Almost surely, 2^8693947957 is an apocalyptic number.

It is an amenable number.

8693947957 is a deficient number, since it is larger than the sum of its proper divisors (142523799).

8693947957 is a wasteful number, since it uses less digits than its factorization.

8693947957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142523798.

The product of its digits is 102876480, while the sum is 67.

The square root of 8693947957 is about 93241.3425310897. The cubic root of 8693947957 is about 2056.2330976065.

The spelling of 8693947957 in words is "eight billion, six hundred ninety-three million, nine hundred forty-seven thousand, nine hundred fifty-seven".