84979994 has 12 divisors (see below), whose sum is σ = 140112042. Its totient is φ = 38627160.

The previous prime is 84979987. The next prime is 84980029. The reversal of 84979994 is 49997948.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 78411025 + 6568969 = 8855^2 + 2563^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175337 + ... + 175820.

Almost surely, 2^84979994 is an apocalyptic number.

84979994 is a deficient number, since it is larger than the sum of its proper divisors (55132048).

84979994 is a wasteful number, since it uses less digits than its factorization.

84979994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351181 (or 351170 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 59.

The square root of 84979994 is about 9218.4594157592. The cubic root of 84979994 is about 439.6484692251.

The spelling of 84979994 in words is "eighty-four million, nine hundred seventy-nine thousand, nine hundred ninety-four".