7131989631 has 12 divisors (see below), whose sum is σ = 10241562968. Its totient is φ = 4388592144.

The previous prime is 7131989603. The next prime is 7131989671. The reversal of 7131989631 is 1369891317.

It is not a de Polignac number, because 7131989631 - 2⁹ = 7131989119 is a prime.

It is a super-2 number, since 2×7131989631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131989671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520636 + ... + 534158.

Almost surely, 2^7131989631 is an apocalyptic number.

7131989631 is a deficient number, since it is larger than the sum of its proper divisors (3109573337).

7131989631 is an frugal number, since it uses more digits than its factorization.

7131989631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27062 (or 13539 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 7131989631 is about 84451.1079323415. The cubic root of 7131989631 is about 1924.8795904670.

The spelling of 7131989631 in words is "seven billion, one hundred thirty-one million, nine hundred eighty-nine thousand, six hundred thirty-one".