68879777 has 4 divisors (see below), whose sum is σ = 69278100. Its totient is φ = 68481456.

The previous prime is 68879771. The next prime is 68879803. The reversal of 68879777 is 77797886.

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 41589601 + 27290176 = 6449^2 + 5224^2 .

It is a cyclic number.

It is not a de Polignac number, because 68879777 - 2⁴ = 68879761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68879771) 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, 198902 + ... + 199247.

It is an arithmetic number, because the mean of its divisors is an integer number (17319525).

Almost surely, 2^68879777 is an apocalyptic number.

It is an amenable number.

68879777 is a deficient number, since it is larger than the sum of its proper divisors (398323).

68879777 is a wasteful number, since it uses less digits than its factorization.

68879777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398322.

The product of its digits is 8297856, while the sum is 59.

The square root of 68879777 is about 8299.3841337776. The cubic root of 68879777 is about 409.9182406871.

The spelling of 68879777 in words is "sixty-eight million, eight hundred seventy-nine thousand, seven hundred seventy-seven".