84974831 has 2 divisors, whose sum is σ = 84974832. Its totient is φ = 84974830.

The previous prime is 84974807. The next prime is 84974833. The reversal of 84974831 is 13847948.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84974831 is a prime.

It is a super-2 number, since 2×84974831² = 14441443806957122, which contains 22 as substring.

Together with 84974833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84974833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42487415 + 42487416.

It is an arithmetic number, because the mean of its divisors is an integer number (42487416).

Almost surely, 2^84974831 is an apocalyptic number.

84974831 is a deficient number, since it is larger than the sum of its proper divisors (1).

84974831 is an equidigital number, since it uses as much as digits as its factorization.

84974831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 84974831 is about 9218.1793755600. The cubic root of 84974831 is about 439.6395653607.

The spelling of 84974831 in words is "eighty-four million, nine hundred seventy-four thousand, eight hundred thirty-one".