68877986 has 4 divisors (see below), whose sum is σ = 103316982. Its totient is φ = 34438992.

The previous prime is 68877973. The next prime is 68877997. The reversal of 68877986 is 68977886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68977886 = 2 ⋅34488943.

It can be written as a sum of positive squares in only one way, i.e., 48038761 + 20839225 = 6931^2 + 4565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17219495 + ... + 17219498.

Almost surely, 2^68877986 is an apocalyptic number.

68877986 is a deficient number, since it is larger than the sum of its proper divisors (34438996).

68877986 is a wasteful number, since it uses less digits than its factorization.

68877986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34438995.

The product of its digits is 8128512, while the sum is 59.

The square root of 68877986 is about 8299.2762335037. The cubic root of 68877986 is about 409.9146877820.

The spelling of 68877986 in words is "sixty-eight million, eight hundred seventy-seven thousand, nine hundred eighty-six".