84447999931 has 2 divisors, whose sum is σ = 84447999932. Its totient is φ = 84447999930.

The previous prime is 84447999893. The next prime is 84448000027. The reversal of 84447999931 is 13999974448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84447999931 - 2⁷ = 84447999803 is a prime.

It is a super-2 number, since 2×84447999931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84447999331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42223999965 + 42223999966.

It is an arithmetic number, because the mean of its divisors is an integer number (42223999966).

Almost surely, 2^84447999931 is an apocalyptic number.

84447999931 is a deficient number, since it is larger than the sum of its proper divisors (1).

84447999931 is an equidigital number, since it uses as much as digits as its factorization.

84447999931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 67.

The spelling of 84447999931 in words is "eighty-four billion, four hundred forty-seven million, nine hundred ninety-nine thousand, nine hundred thirty-one".