609638431 has 2 divisors, whose sum is σ = 609638432. Its totient is φ = 609638430.

The previous prime is 609638369. The next prime is 609638443. The reversal of 609638431 is 134836906.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 609638431 - 2⁷ = 609638303 is a prime.

It is a super-2 number, since 2×609638431² = 743318033104283522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609638461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304819215 + 304819216.

It is an arithmetic number, because the mean of its divisors is an integer number (304819216).

Almost surely, 2^609638431 is an apocalyptic number.

609638431 is a deficient number, since it is larger than the sum of its proper divisors (1).

609638431 is an equidigital number, since it uses as much as digits as its factorization.

609638431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 609638431 is about 24690.8572350172. The cubic root of 609638431 is about 847.9250107052.

The spelling of 609638431 in words is "six hundred nine million, six hundred thirty-eight thousand, four hundred thirty-one".