68897957 has 4 divisors (see below), whose sum is σ = 72950796. Its totient is φ = 64845120.

The previous prime is 68897953. The next prime is 68897963. The reversal of 68897957 is 75979886.

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 42003361 + 26894596 = 6481^2 + 5186^2 .

It is a cyclic number.

It is not a de Polignac number, because 68897957 - 2² = 68897953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68897896 and 68897905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68897953) 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, 2026394 + ... + 2026427.

It is an arithmetic number, because the mean of its divisors is an integer number (18237699).

Almost surely, 2^68897957 is an apocalyptic number.

It is an amenable number.

68897957 is a deficient number, since it is larger than the sum of its proper divisors (4052839).

68897957 is a wasteful number, since it uses less digits than its factorization.

68897957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052838.

The product of its digits is 7620480, while the sum is 59.

The square root of 68897957 is about 8300.4793235090. The cubic root of 68897957 is about 409.9543018669.

The spelling of 68897957 in words is "sixty-eight million, eight hundred ninety-seven thousand, nine hundred fifty-seven".