431140021877 has 2 divisors, whose sum is σ = 431140021878. Its totient is φ = 431140021876.

The previous prime is 431140021861. The next prime is 431140021909. The reversal of 431140021877 is 778120041134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413180269681 + 17959752196 = 642791^2 + 134014^2 .

It is a cyclic number.

It is not a de Polignac number, because 431140021877 - 2⁴ = 431140021861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 431140021877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431140021817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215570010938 + 215570010939.

It is an arithmetic number, because the mean of its divisors is an integer number (215570010939).

Almost surely, 2^431140021877 is an apocalyptic number.

It is an amenable number.

431140021877 is a deficient number, since it is larger than the sum of its proper divisors (1).

431140021877 is an equidigital number, since it uses as much as digits as its factorization.

431140021877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 431140021877 in words is "four hundred thirty-one billion, one hundred forty million, twenty-one thousand, eight hundred seventy-seven".