84394339631 has 16 divisors (see below), whose sum is σ = 101685024000. Its totient is φ = 68424092928.

The previous prime is 84394339597. The next prime is 84394339633. The reversal of 84394339631 is 13693349348.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84394339631 is a prime.

It is a super-2 number, since 2×84394339631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84394339633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407906 + ... + 578943.

It is an arithmetic number, because the mean of its divisors is an integer number (6355314000).

Almost surely, 2^84394339631 is an apocalyptic number.

84394339631 is a deficient number, since it is larger than the sum of its proper divisors (17290684369).

84394339631 is a wasteful number, since it uses less digits than its factorization.

84394339631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987518.

The product of its digits is 5038848, while the sum is 53.

The spelling of 84394339631 in words is "eighty-four billion, three hundred ninety-four million, three hundred thirty-nine thousand, six hundred thirty-one".