131745823477 has 2 divisors, whose sum is σ = 131745823478. Its totient is φ = 131745823476.

The previous prime is 131745823399. The next prime is 131745823537. The reversal of 131745823477 is 774328547131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68358194116 + 63387629361 = 261454^2 + 251769^2 .

It is an emirp because it is prime and its reverse (774328547131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131745823477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131745823177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65872911738 + 65872911739.

It is an arithmetic number, because the mean of its divisors is an integer number (65872911739).

Almost surely, 2^131745823477 is an apocalyptic number.

It is an amenable number.

131745823477 is a deficient number, since it is larger than the sum of its proper divisors (1).

131745823477 is an equidigital number, since it uses as much as digits as its factorization.

131745823477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 52.

The spelling of 131745823477 in words is "one hundred thirty-one billion, seven hundred forty-five million, eight hundred twenty-three thousand, four hundred seventy-seven".