659161949 has 2 divisors, whose sum is σ = 659161950. Its totient is φ = 659161948.

The previous prime is 659161939. The next prime is 659161957. The reversal of 659161949 is 949161956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595848100 + 63313849 = 24410^2 + 7957^2 .

It is a cyclic number.

It is not a de Polignac number, because 659161949 - 2⁸ = 659161693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 659161897 and 659161906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659161939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329580974 + 329580975.

It is an arithmetic number, because the mean of its divisors is an integer number (329580975).

Almost surely, 2^659161949 is an apocalyptic number.

It is an amenable number.

659161949 is a deficient number, since it is larger than the sum of its proper divisors (1).

659161949 is an equidigital number, since it uses as much as digits as its factorization.

659161949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 50.

The square root of 659161949 is about 25674.1494308964. The cubic root of 659161949 is about 870.2900996713.

The spelling of 659161949 in words is "six hundred fifty-nine million, one hundred sixty-one thousand, nine hundred forty-nine".