68537977 has 4 divisors (see below), whose sum is σ = 68642640. Its totient is φ = 68433316.

The previous prime is 68537971. The next prime is 68538007. The reversal of 68537977 is 77973586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68537977 - 2⁷ = 68537849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68537971) 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, 51343 + ... + 52660.

It is an arithmetic number, because the mean of its divisors is an integer number (17160660).

Almost surely, 2^68537977 is an apocalyptic number.

It is an amenable number.

68537977 is a deficient number, since it is larger than the sum of its proper divisors (104663).

68537977 is a wasteful number, since it uses less digits than its factorization.

68537977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104662.

The product of its digits is 2222640, while the sum is 52.

The square root of 68537977 is about 8278.7666351939. The cubic root of 68537977 is about 409.2390744818.

The spelling of 68537977 in words is "sixty-eight million, five hundred thirty-seven thousand, nine hundred seventy-seven".