156149849 has 2 divisors, whose sum is σ = 156149850. Its totient is φ = 156149848.

The previous prime is 156149831. The next prime is 156149857. The reversal of 156149849 is 948941651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149621824 + 6528025 = 12232^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 156149849 - 2⁸ = 156149593 is a prime.

It is not a weakly prime, because it can be changed into another prime (156148849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78074924 + 78074925.

It is an arithmetic number, because the mean of its divisors is an integer number (78074925).

Almost surely, 2^156149849 is an apocalyptic number.

It is an amenable number.

156149849 is a deficient number, since it is larger than the sum of its proper divisors (1).

156149849 is an equidigital number, since it uses as much as digits as its factorization.

156149849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 156149849 is about 12495.9933178599. The cubic root of 156149849 is about 538.4935712252.

The spelling of 156149849 in words is "one hundred fifty-six million, one hundred forty-nine thousand, eight hundred forty-nine".