149136913 has 4 divisors (see below), whose sum is σ = 149341108. Its totient is φ = 148932720.

The previous prime is 149136901. The next prime is 149136919. The reversal of 149136913 is 319631941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319631941 = 41 ⋅7795901.

It can be written as a sum of positive squares in 2 ways, for example, as 146119744 + 3017169 = 12088^2 + 1737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149136913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149136919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100998 + ... + 102463.

It is an arithmetic number, because the mean of its divisors is an integer number (37335277).

Almost surely, 2^149136913 is an apocalyptic number.

It is an amenable number.

149136913 is a deficient number, since it is larger than the sum of its proper divisors (204195).

149136913 is an equidigital number, since it uses as much as digits as its factorization.

149136913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204194.

The product of its digits is 17496, while the sum is 37.

The square root of 149136913 is about 12212.1625030131. The cubic root of 149136913 is about 530.3082495460.

The spelling of 149136913 in words is "one hundred forty-nine million, one hundred thirty-six thousand, nine hundred thirteen".