5131123639 has 2 divisors, whose sum is σ = 5131123640. Its totient is φ = 5131123638.

The previous prime is 5131123607. The next prime is 5131123643. The reversal of 5131123639 is 9363211315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5131123639 - 2⁵ = 5131123607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5131124639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565561819 + 2565561820.

It is an arithmetic number, because the mean of its divisors is an integer number (2565561820).

Almost surely, 2^5131123639 is an apocalyptic number.

5131123639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5131123639 is an equidigital number, since it uses as much as digits as its factorization.

5131123639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 5131123639 is about 71631.8618981805. The cubic root of 5131123639 is about 1724.7950342759.

The spelling of 5131123639 in words is "five billion, one hundred thirty-one million, one hundred twenty-three thousand, six hundred thirty-nine".