431140021969 has 2 divisors, whose sum is σ = 431140021970. Its totient is φ = 431140021968.

The previous prime is 431140021951. The next prime is 431140022011. The reversal of 431140021969 is 969120041134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242002011969 + 189138010000 = 491937^2 + 434900^2 .

It is a cyclic number.

It is not a de Polignac number, because 431140021969 - 2⁷ = 431140021841 is a prime.

It is a super-2 number, since 2×431140021969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431140021909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215570010984 + 215570010985.

It is an arithmetic number, because the mean of its divisors is an integer number (215570010985).

Almost surely, 2^431140021969 is an apocalyptic number.

It is an amenable number.

431140021969 is a deficient number, since it is larger than the sum of its proper divisors (1).

431140021969 is an equidigital number, since it uses as much as digits as its factorization.

431140021969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 431140021969 in words is "four hundred thirty-one billion, one hundred forty million, twenty-one thousand, nine hundred sixty-nine".