659494439 has 2 divisors, whose sum is σ = 659494440. Its totient is φ = 659494438.

The previous prime is 659494421. The next prime is 659494453. The reversal of 659494439 is 934494956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 659494439 - 2¹² = 659490343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659494469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329747219 + 329747220.

It is an arithmetic number, because the mean of its divisors is an integer number (329747220).

Almost surely, 2^659494439 is an apocalyptic number.

659494439 is a deficient number, since it is larger than the sum of its proper divisors (1).

659494439 is an equidigital number, since it uses as much as digits as its factorization.

659494439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 53.

The square root of 659494439 is about 25680.6238047287. The cubic root of 659494439 is about 870.4364036848.

The spelling of 659494439 in words is "six hundred fifty-nine million, four hundred ninety-four thousand, four hundred thirty-nine".