84450931 has 2 divisors, whose sum is σ = 84450932. Its totient is φ = 84450930.

The previous prime is 84450907. The next prime is 84450973. The reversal of 84450931 is 13905448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84450931 - 2⁷ = 84450803 is a prime.

It is a super-2 number, since 2×84450931² = 14263919493533522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84450031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42225465 + 42225466.

It is an arithmetic number, because the mean of its divisors is an integer number (42225466).

Almost surely, 2^84450931 is an apocalyptic number.

84450931 is a deficient number, since it is larger than the sum of its proper divisors (1).

84450931 is an equidigital number, since it uses as much as digits as its factorization.

84450931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 84450931 is about 9189.7187660994. The cubic root of 84450931 is about 438.7341908195.

The spelling of 84450931 in words is "eighty-four million, four hundred fifty thousand, nine hundred thirty-one".