68879247 has 4 divisors (see below), whose sum is σ = 91839000. Its totient is φ = 45919496.

The previous prime is 68879233. The next prime is 68879267. The reversal of 68879247 is 74297886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68879247 - 2⁷ = 68879119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68879247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68879267) 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, 11479872 + ... + 11479877.

It is an arithmetic number, because the mean of its divisors is an integer number (22959750).

Almost surely, 2^68879247 is an apocalyptic number.

68879247 is a deficient number, since it is larger than the sum of its proper divisors (22959753).

68879247 is a wasteful number, since it uses less digits than its factorization.

68879247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959752.

The product of its digits is 1354752, while the sum is 51.

The square root of 68879247 is about 8299.3522036361. The cubic root of 68879247 is about 409.9171893034.

The spelling of 68879247 in words is "sixty-eight million, eight hundred seventy-nine thousand, two hundred forty-seven".