431986239761 has 2 divisors, whose sum is σ = 431986239762. Its totient is φ = 431986239760.

The previous prime is 431986239691. The next prime is 431986239767. The reversal of 431986239761 is 167932689134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399606036736 + 32380203025 = 632144^2 + 179945^2 .

It is a cyclic number.

It is not a de Polignac number, because 431986239761 - 2¹⁰ = 431986238737 is a prime.

It is a super-2 number, since 2×431986239761² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 431986239761.

It is not a weakly prime, because it can be changed into another prime (431986239767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215993119880 + 215993119881.

It is an arithmetic number, because the mean of its divisors is an integer number (215993119881).

Almost surely, 2^431986239761 is an apocalyptic number.

It is an amenable number.

431986239761 is a deficient number, since it is larger than the sum of its proper divisors (1).

431986239761 is an equidigital number, since it uses as much as digits as its factorization.

431986239761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The spelling of 431986239761 in words is "four hundred thirty-one billion, nine hundred eighty-six million, two hundred thirty-nine thousand, seven hundred sixty-one".