68429957 has 2 divisors, whose sum is σ = 68429958. Its totient is φ = 68429956.

The previous prime is 68429953. The next prime is 68429969. The reversal of 68429957 is 75992486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49758916 + 18671041 = 7054^2 + 4321^2 .

It is a cyclic number.

It is not a de Polignac number, because 68429957 - 2² = 68429953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68429953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34214978 + 34214979.

It is an arithmetic number, because the mean of its divisors is an integer number (34214979).

Almost surely, 2^68429957 is an apocalyptic number.

It is an amenable number.

68429957 is a deficient number, since it is larger than the sum of its proper divisors (1).

68429957 is an equidigital number, since it uses as much as digits as its factorization.

68429957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 68429957 is about 8272.2401439997. The cubic root of 68429957 is about 409.0239662508.

The spelling of 68429957 in words is "sixty-eight million, four hundred twenty-nine thousand, nine hundred fifty-seven".