84747031 has 2 divisors, whose sum is σ = 84747032. Its totient is φ = 84747030.

The previous prime is 84747017. The next prime is 84747037. The reversal of 84747031 is 13074748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84747031 is a prime.

It is a super-2 number, since 2×84747031² = 14364118526629922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84747037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42373515 + 42373516.

It is an arithmetic number, because the mean of its divisors is an integer number (42373516).

Almost surely, 2^84747031 is an apocalyptic number.

84747031 is a deficient number, since it is larger than the sum of its proper divisors (1).

84747031 is an equidigital number, since it uses as much as digits as its factorization.

84747031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 84747031 is about 9205.8150644036. The cubic root of 84747031 is about 439.2463527703.

The spelling of 84747031 in words is "eighty-four million, seven hundred forty-seven thousand, thirty-one".