431497609 has 2 divisors, whose sum is σ = 431497610. Its totient is φ = 431497608.

The previous prime is 431497607. The next prime is 431497639. The reversal of 431497609 is 906794134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409171984 + 22325625 = 20228^2 + 4725^2 .

It is a cyclic number.

It is not a de Polignac number, because 431497609 - 2¹ = 431497607 is a prime.

Together with 431497607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (431497607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215748804 + 215748805.

It is an arithmetic number, because the mean of its divisors is an integer number (215748805).

Almost surely, 2^431497609 is an apocalyptic number.

It is an amenable number.

431497609 is a deficient number, since it is larger than the sum of its proper divisors (1).

431497609 is an equidigital number, since it uses as much as digits as its factorization.

431497609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 431497609 is about 20772.5205259256. The cubic root of 431497609 is about 755.6594732123.

The spelling of 431497609 in words is "four hundred thirty-one million, four hundred ninety-seven thousand, six hundred nine".