131365769 has 2 divisors, whose sum is σ = 131365770. Its totient is φ = 131365768.

The previous prime is 131365739. The next prime is 131365813. The reversal of 131365769 is 967563131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115842169 + 15523600 = 10763^2 + 3940^2 .

It is an emirp because it is prime and its reverse (967563131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131365769 - 2¹² = 131361673 is a prime.

It is a super-2 number, since 2×131365769² = 34513930529922722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131365709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65682884 + 65682885.

It is an arithmetic number, because the mean of its divisors is an integer number (65682885).

Almost surely, 2^131365769 is an apocalyptic number.

It is an amenable number.

131365769 is a deficient number, since it is larger than the sum of its proper divisors (1).

131365769 is an equidigital number, since it uses as much as digits as its factorization.

131365769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 131365769 is about 11461.4906971127. The cubic root of 131365769 is about 508.3475531511.

The spelling of 131365769 in words is "one hundred thirty-one million, three hundred sixty-five thousand, seven hundred sixty-nine".