659749801 has 2 divisors, whose sum is σ = 659749802. Its totient is φ = 659749800.

The previous prime is 659749793. The next prime is 659749823. The reversal of 659749801 is 108947956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620059801 + 39690000 = 24901^2 + 6300^2 .

It is a cyclic number.

It is not a de Polignac number, because 659749801 - 2³ = 659749793 is a prime.

It is not a weakly prime, because it can be changed into another prime (659744801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329874900 + 329874901.

It is an arithmetic number, because the mean of its divisors is an integer number (329874901).

Almost surely, 2^659749801 is an apocalyptic number.

It is an amenable number.

659749801 is a deficient number, since it is larger than the sum of its proper divisors (1).

659749801 is an equidigital number, since it uses as much as digits as its factorization.

659749801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 659749801 is about 25685.5952043164. The cubic root of 659749801 is about 870.5487360437.

The spelling of 659749801 in words is "six hundred fifty-nine million, seven hundred forty-nine thousand, eight hundred one".