7437791131 has 2 divisors, whose sum is σ = 7437791132. Its totient is φ = 7437791130.

The previous prime is 7437791113. The next prime is 7437791147. The reversal of 7437791131 is 1311977347.

Together with previous prime (7437791113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7437791131 - 2¹¹ = 7437789083 is a prime.

It is a super-2 number, since 2×7437791131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7437791161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3718895565 + 3718895566.

It is an arithmetic number, because the mean of its divisors is an integer number (3718895566).

Almost surely, 2^7437791131 is an apocalyptic number.

7437791131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7437791131 is an equidigital number, since it uses as much as digits as its factorization.

7437791131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111132, while the sum is 43.

The square root of 7437791131 is about 86242.6294299982. The cubic root of 7437791131 is about 1952.0067993463.

The spelling of 7437791131 in words is "seven billion, four hundred thirty-seven million, seven hundred ninety-one thousand, one hundred thirty-one".