84897974439 has 12 divisors (see below), whose sum is σ = 122634655416. Its totient is φ = 56596689072.

The previous prime is 84897974431. The next prime is 84897974479. The reversal of 84897974439 is 93447979848.

84897974439 is a `hidden beast` number, since 8 + 4 + 8 + 97 + 97 + 443 + 9 = 666.

It is not a de Polignac number, because 84897974439 - 2³ = 84897974431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84897974431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140649 + ... + 435405.

It is an arithmetic number, because the mean of its divisors is an integer number (10219554618).

Almost surely, 2^84897974439 is an apocalyptic number.

84897974439 is a deficient number, since it is larger than the sum of its proper divisors (37736680977).

84897974439 is a wasteful number, since it uses less digits than its factorization.

84897974439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326766 (or 326763 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 72.

The spelling of 84897974439 in words is "eighty-four billion, eight hundred ninety-seven million, nine hundred seventy-four thousand, four hundred thirty-nine".