4138615931 has 2 divisors, whose sum is σ = 4138615932. Its totient is φ = 4138615930.

The previous prime is 4138615919. The next prime is 4138615933. The reversal of 4138615931 is 1395168314.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4138615931 - 2²⁶ = 4071507067 is a prime.

It is a super-2 number, since 2×4138615931² = 34256283648653993522, which contains 22 as substring.

Together with 4138615933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4138615933) 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, 2069307965 + 2069307966.

It is an arithmetic number, because the mean of its divisors is an integer number (2069307966).

Almost surely, 2^4138615931 is an apocalyptic number.

4138615931 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138615931 is an equidigital number, since it uses as much as digits as its factorization.

4138615931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 4138615931 is about 64332.0754445246. The cubic root of 4138615931 is about 1605.5298155439.

The spelling of 4138615931 in words is "four billion, one hundred thirty-eight million, six hundred fifteen thousand, nine hundred thirty-one".