84631951 has 2 divisors, whose sum is σ = 84631952. Its totient is φ = 84631950.

The previous prime is 84631903. The next prime is 84631979. The reversal of 84631951 is 15913648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84631951 - 2¹⁷ = 84500879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84631951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84631991) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42315975 + 42315976.

It is an arithmetic number, because the mean of its divisors is an integer number (42315976).

Almost surely, 2^84631951 is an apocalyptic number.

84631951 is a deficient number, since it is larger than the sum of its proper divisors (1).

84631951 is an equidigital number, since it uses as much as digits as its factorization.

84631951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 84631951 is about 9199.5625439474. The cubic root of 84631951 is about 439.0474417002.

The spelling of 84631951 in words is "eighty-four million, six hundred thirty-one thousand, nine hundred fifty-one".