7631918731 has 2 divisors, whose sum is σ = 7631918732. Its totient is φ = 7631918730.

The previous prime is 7631918729. The next prime is 7631918747. The reversal of 7631918731 is 1378191367.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7631918731 - 2¹ = 7631918729 is a prime.

It is a super-3 number, since 3×7631918731³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 7631918729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7631918711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3815959365 + 3815959366.

It is an arithmetic number, because the mean of its divisors is an integer number (3815959366).

Almost surely, 2^7631918731 is an apocalyptic number.

7631918731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7631918731 is an equidigital number, since it uses as much as digits as its factorization.

7631918731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 7631918731 is about 87360.8535386417. The cubic root of 7631918731 is about 1968.8437244827.

The spelling of 7631918731 in words is "seven billion, six hundred thirty-one million, nine hundred eighteen thousand, seven hundred thirty-one".