319432609 has 2 divisors, whose sum is σ = 319432610. Its totient is φ = 319432608.

The previous prime is 319432591. The next prime is 319432613. The reversal of 319432609 is 906234913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252651025 + 66781584 = 15895^2 + 8172^2 .

It is a cyclic number.

It is not a de Polignac number, because 319432609 - 2⁵ = 319432577 is a prime.

It is not a weakly prime, because it can be changed into another prime (319432679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159716304 + 159716305.

It is an arithmetic number, because the mean of its divisors is an integer number (159716305).

Almost surely, 2^319432609 is an apocalyptic number.

It is an amenable number.

319432609 is a deficient number, since it is larger than the sum of its proper divisors (1).

319432609 is an equidigital number, since it uses as much as digits as its factorization.

319432609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 319432609 is about 17872.6777232736. The cubic root of 319432609 is about 683.5858791031.

The spelling of 319432609 in words is "three hundred nineteen million, four hundred thirty-two thousand, six hundred nine".