7640131 has 2 divisors, whose sum is σ = 7640132. Its totient is φ = 7640130.

The previous prime is 7640069. The next prime is 7640141. The reversal of 7640131 is 1310467.

It is a strong prime.

It is an emirp because it is prime and its reverse (1310467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7640131 - 2¹⁵ = 7607363 is a prime.

It is a super-2 number, since 2×7640131² = 116743203394322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7640141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820065 + 3820066.

It is an arithmetic number, because the mean of its divisors is an integer number (3820066).

Almost surely, 2^7640131 is an apocalyptic number.

7640131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640131 is an equidigital number, since it uses as much as digits as its factorization.

7640131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7640131 is about 2764.0786891838. The cubic root of 7640131 is about 196.9549657854.

Adding to 7640131 its reverse (1310467), we get a palindrome (8950598).

The spelling of 7640131 in words is "seven million, six hundred forty thousand, one hundred thirty-one".