149661913 has 2 divisors, whose sum is σ = 149661914. Its totient is φ = 149661912.

The previous prime is 149661871. The next prime is 149661971. The reversal of 149661913 is 319166941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132089049 + 17572864 = 11493^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 149661913 - 2¹⁷ = 149530841 is a prime.

It is not a weakly prime, because it can be changed into another prime (149662913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74830956 + 74830957.

It is an arithmetic number, because the mean of its divisors is an integer number (74830957).

Almost surely, 2^149661913 is an apocalyptic number.

It is an amenable number.

149661913 is a deficient number, since it is larger than the sum of its proper divisors (1).

149661913 is an equidigital number, since it uses as much as digits as its factorization.

149661913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 149661913 is about 12233.6385838392. The cubic root of 149661913 is about 530.9297942490.

The spelling of 149661913 in words is "one hundred forty-nine million, six hundred sixty-one thousand, nine hundred thirteen".