431377828969 has 2 divisors, whose sum is σ = 431377828970. Its totient is φ = 431377828968.

The previous prime is 431377828951. The next prime is 431377829023. The reversal of 431377828969 is 969828773134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263615499225 + 167762329744 = 513435^2 + 409588^2 .

It is a cyclic number.

It is not a de Polignac number, because 431377828969 - 2²¹ = 431375731817 is a prime.

It is a super-2 number, since 2×431377828969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431377828909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215688914484 + 215688914485.

It is an arithmetic number, because the mean of its divisors is an integer number (215688914485).

Almost surely, 2^431377828969 is an apocalyptic number.

It is an amenable number.

431377828969 is a deficient number, since it is larger than the sum of its proper divisors (1).

431377828969 is an equidigital number, since it uses as much as digits as its factorization.

431377828969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 67.

The spelling of 431377828969 in words is "four hundred thirty-one billion, three hundred seventy-seven million, eight hundred twenty-eight thousand, nine hundred sixty-nine".