431447609 has 2 divisors, whose sum is σ = 431447610. Its totient is φ = 431447608.

The previous prime is 431447603. The next prime is 431447623. The reversal of 431447609 is 906744134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365383225 + 66064384 = 19115^2 + 8128^2 .

It is a cyclic number.

It is not a de Polignac number, because 431447609 - 2¹⁶ = 431382073 is a prime.

It is a super-2 number, since 2×431447609² = 372294078623633762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431447603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215723804 + 215723805.

It is an arithmetic number, because the mean of its divisors is an integer number (215723805).

Almost surely, 2^431447609 is an apocalyptic number.

It is an amenable number.

431447609 is a deficient number, since it is larger than the sum of its proper divisors (1).

431447609 is an equidigital number, since it uses as much as digits as its factorization.

431447609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 431447609 is about 20771.3169779867. The cubic root of 431447609 is about 755.6302846125.

The spelling of 431447609 in words is "four hundred thirty-one million, four hundred forty-seven thousand, six hundred nine".