659727961 has 2 divisors, whose sum is σ = 659727962. Its totient is φ = 659727960.

The previous prime is 659727923. The next prime is 659727977. The reversal of 659727961 is 169727956.

It is a happy number.

659727961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460917961 + 198810000 = 21469^2 + 14100^2 .

It is a cyclic number.

It is not a de Polignac number, because 659727961 - 2¹⁵ = 659695193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 659727899 and 659727908.

It is not a weakly prime, because it can be changed into another prime (659727161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329863980 + 329863981.

It is an arithmetic number, because the mean of its divisors is an integer number (329863981).

Almost surely, 2^659727961 is an apocalyptic number.

It is an amenable number.

659727961 is a deficient number, since it is larger than the sum of its proper divisors (1).

659727961 is an equidigital number, since it uses as much as digits as its factorization.

659727961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 52.

The square root of 659727961 is about 25685.1700597835. The cubic root of 659727961 is about 870.5391298798.

The spelling of 659727961 in words is "six hundred fifty-nine million, seven hundred twenty-seven thousand, nine hundred sixty-one".