2149156897 has 2 divisors, whose sum is σ = 2149156898. Its totient is φ = 2149156896.

The previous prime is 2149156873. The next prime is 2149156927. The reversal of 2149156897 is 7986519412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2149156881 + 16 = 46359^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149156897 - 2¹¹ = 2149154849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2149126897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074578448 + 1074578449.

It is an arithmetic number, because the mean of its divisors is an integer number (1074578449).

Almost surely, 2^2149156897 is an apocalyptic number.

It is an amenable number.

2149156897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149156897 is an equidigital number, since it uses as much as digits as its factorization.

2149156897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 52.

The square root of 2149156897 is about 46359.0001725663. Note that the first 3 decimals coincide. The cubic root of 2149156897 is about 1290.4941513693.

The spelling of 2149156897 in words is "two billion, one hundred forty-nine million, one hundred fifty-six thousand, eight hundred ninety-seven".