68591077 has 4 divisors (see below), whose sum is σ = 68785740. Its totient is φ = 68396416.

The previous prime is 68591071. The next prime is 68591093. The reversal of 68591077 is 77019586.

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 42693156 + 25897921 = 6534^2 + 5089^2 .

It is a cyclic number.

It is not a de Polignac number, because 68591077 - 2³ = 68591069 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 (68591071) 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, 96802 + ... + 97507.

It is an arithmetic number, because the mean of its divisors is an integer number (17196435).

Almost surely, 2^68591077 is an apocalyptic number.

It is an amenable number.

68591077 is a deficient number, since it is larger than the sum of its proper divisors (194663).

68591077 is a wasteful number, since it uses less digits than its factorization.

68591077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194662.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 68591077 is about 8281.9730137208. The cubic root of 68591077 is about 409.3447335936.

The spelling of 68591077 in words is "sixty-eight million, five hundred ninety-one thousand, seventy-seven".