659925493 has 2 divisors, whose sum is σ = 659925494. Its totient is φ = 659925492.

The previous prime is 659925481. The next prime is 659925503. The reversal of 659925493 is 394529956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451902564 + 208022929 = 21258^2 + 14423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659925493 is a prime.

It is a super-2 number, since 2×659925493² = 871003312622586098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 659925493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659925293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329962746 + 329962747.

It is an arithmetic number, because the mean of its divisors is an integer number (329962747).

Almost surely, 2^659925493 is an apocalyptic number.

It is an amenable number.

659925493 is a deficient number, since it is larger than the sum of its proper divisors (1).

659925493 is an equidigital number, since it uses as much as digits as its factorization.

659925493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2624400, while the sum is 52.

The square root of 659925493 is about 25689.0150258822. The cubic root of 659925493 is about 870.6260051708.

The spelling of 659925493 in words is "six hundred fifty-nine million, nine hundred twenty-five thousand, four hundred ninety-three".