68879091 has 4 divisors (see below), whose sum is σ = 91838792. Its totient is φ = 45919392.

The previous prime is 68879039. The next prime is 68879099. The reversal of 68879091 is 19097886.

It is a happy number.

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

It is not a de Polignac number, because 68879091 - 2⁷ = 68878963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68879091.

It is not an unprimeable number, because it can be changed into a prime (68879099) 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, 11479846 + ... + 11479851.

It is an arithmetic number, because the mean of its divisors is an integer number (22959698).

Almost surely, 2^68879091 is an apocalyptic number.

68879091 is a deficient number, since it is larger than the sum of its proper divisors (22959701).

68879091 is a wasteful number, since it uses less digits than its factorization.

68879091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959700.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 68879091 is about 8299.3428053069. The cubic root of 68879091 is about 409.9168798385.

The spelling of 68879091 in words is "sixty-eight million, eight hundred seventy-nine thousand, ninety-one".