76131443209 has 2 divisors, whose sum is σ = 76131443210. Its totient is φ = 76131443208.

The previous prime is 76131443177. The next prime is 76131443221. The reversal of 76131443209 is 90234413167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45466179984 + 30665263225 = 213228^2 + 175115^2 .

It is an emirp because it is prime and its reverse (90234413167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76131443209 - 2⁵ = 76131443177 is a prime.

It is not a weakly prime, because it can be changed into another prime (76131443299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38065721604 + 38065721605.

It is an arithmetic number, because the mean of its divisors is an integer number (38065721605).

Almost surely, 2^76131443209 is an apocalyptic number.

It is an amenable number.

76131443209 is a deficient number, since it is larger than the sum of its proper divisors (1).

76131443209 is an equidigital number, since it uses as much as digits as its factorization.

76131443209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 76131443209 in words is "seventy-six billion, one hundred thirty-one million, four hundred forty-three thousand, two hundred nine".