68927557 has 2 divisors, whose sum is σ = 68927558. Its totient is φ = 68927556.

The previous prime is 68927533. The next prime is 68927561. The reversal of 68927557 is 75572986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44809636 + 24117921 = 6694^2 + 4911^2 .

It is a cyclic number.

It is not a de Polignac number, because 68927557 - 2⁷ = 68927429 is a prime.

It is a super-2 number, since 2×68927557² = 9502016227976498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68927557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68927587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34463778 + 34463779.

It is an arithmetic number, because the mean of its divisors is an integer number (34463779).

Almost surely, 2^68927557 is an apocalyptic number.

It is an amenable number.

68927557 is a deficient number, since it is larger than the sum of its proper divisors (1).

68927557 is an equidigital number, since it uses as much as digits as its factorization.

68927557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 49.

The square root of 68927557 is about 8302.2621616039. The cubic root of 68927557 is about 410.0130017689.

The spelling of 68927557 in words is "sixty-eight million, nine hundred twenty-seven thousand, five hundred fifty-seven".