84515139 has 6 divisors (see below), whose sum is σ = 122077436. Its totient is φ = 56343420.

The previous prime is 84515129. The next prime is 84515147. The reversal of 84515139 is 93151548.

84515139 is a `hidden beast` number, since 8 + 4 + 515 + 139 = 666.

It is not a de Polignac number, because 84515139 - 2⁵ = 84515107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84515129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4695277 + ... + 4695294.

Almost surely, 2^84515139 is an apocalyptic number.

84515139 is a deficient number, since it is larger than the sum of its proper divisors (37562297).

84515139 is a wasteful number, since it uses less digits than its factorization.

84515139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390577 (or 9390574 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 84515139 is about 9193.2115715891. The cubic root of 84515139 is about 438.8453524465.

The spelling of 84515139 in words is "eighty-four million, five hundred fifteen thousand, one hundred thirty-nine".