84980431 has 2 divisors, whose sum is σ = 84980432. Its totient is φ = 84980430.

The previous prime is 84980419. The next prime is 84980447. The reversal of 84980431 is 13408948.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84980431 is a prime.

It is a super-2 number, since 2×84980431² = 14443347305891522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84980471) 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, 42490215 + 42490216.

It is an arithmetic number, because the mean of its divisors is an integer number (42490216).

Almost surely, 2^84980431 is an apocalyptic number.

84980431 is a deficient number, since it is larger than the sum of its proper divisors (1).

84980431 is an equidigital number, since it uses as much as digits as its factorization.

84980431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 84980431 is about 9218.4831181708. The cubic root of 84980431 is about 439.6492228379.

The spelling of 84980431 in words is "eighty-four million, nine hundred eighty thousand, four hundred thirty-one".