131313321077 has 2 divisors, whose sum is σ = 131313321078. Its totient is φ = 131313321076.

The previous prime is 131313320981. The next prime is 131313321091. The reversal of 131313321077 is 770123313131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129092178436 + 2221142641 = 359294^2 + 47129^2 .

It is a cyclic number.

It is not a de Polignac number, because 131313321077 - 2¹⁰ = 131313320053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131313321677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656660538 + 65656660539.

It is an arithmetic number, because the mean of its divisors is an integer number (65656660539).

Almost surely, 2^131313321077 is an apocalyptic number.

It is an amenable number.

131313321077 is a deficient number, since it is larger than the sum of its proper divisors (1).

131313321077 is an equidigital number, since it uses as much as digits as its factorization.

131313321077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 32.

The spelling of 131313321077 in words is "one hundred thirty-one billion, three hundred thirteen million, three hundred twenty-one thousand, seventy-seven".