68005957 has 4 divisors (see below), whose sum is σ = 70351020. Its totient is φ = 65660896.

The previous prime is 68005939. The next prime is 68005979. The reversal of 68005957 is 75950086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75950086 = 2 ⋅37975043.

It can be written as a sum of positive squares in 2 ways, for example, as 48874081 + 19131876 = 6991^2 + 4374^2 .

It is a cyclic number.

It is not a de Polignac number, because 68005957 - 2⁷ = 68005829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68000957) 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, 1172488 + ... + 1172545.

It is an arithmetic number, because the mean of its divisors is an integer number (17587755).

Almost surely, 2^68005957 is an apocalyptic number.

It is an amenable number.

68005957 is a deficient number, since it is larger than the sum of its proper divisors (2345063).

68005957 is a wasteful number, since it uses less digits than its factorization.

68005957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345062.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 68005957 is about 8246.5724395048. The cubic root of 68005957 is about 408.1774286768.

The spelling of 68005957 in words is "sixty-eight million, five thousand, nine hundred fifty-seven".