8458978631 has 2 divisors, whose sum is σ = 8458978632. Its totient is φ = 8458978630.

The previous prime is 8458978601. The next prime is 8458978679. The reversal of 8458978631 is 1368798548.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8458978631 is a prime.

It is a super-2 number, since 2×8458978631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8458978601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4229489315 + 4229489316.

It is an arithmetic number, because the mean of its divisors is an integer number (4229489316).

Almost surely, 2^8458978631 is an apocalyptic number.

8458978631 is a deficient number, since it is larger than the sum of its proper divisors (1).

8458978631 is an equidigital number, since it uses as much as digits as its factorization.

8458978631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 59.

The square root of 8458978631 is about 91972.7059023491. The cubic root of 8458978631 is about 2037.5392146015.

The spelling of 8458978631 in words is "eight billion, four hundred fifty-eight million, nine hundred seventy-eight thousand, six hundred thirty-one".