79440143131 has 2 divisors, whose sum is σ = 79440143132. Its totient is φ = 79440143130.

The previous prime is 79440143093. The next prime is 79440143143. The reversal of 79440143131 is 13134104497.

It is a strong prime.

It is an emirp because it is prime and its reverse (13134104497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79440143131 - 2²¹ = 79438045979 is a prime.

It is a super-2 number, since 2×79440143131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79440243131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39720071565 + 39720071566.

It is an arithmetic number, because the mean of its divisors is an integer number (39720071566).

Almost surely, 2^79440143131 is an apocalyptic number.

79440143131 is a deficient number, since it is larger than the sum of its proper divisors (1).

79440143131 is an equidigital number, since it uses as much as digits as its factorization.

79440143131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 79440143131 in words is "seventy-nine billion, four hundred forty million, one hundred forty-three thousand, one hundred thirty-one".