149688517 has 16 divisors (see below), whose sum is σ = 177825600. Its totient is φ = 124467840.

The previous prime is 149688509. The next prime is 149688521. The reversal of 149688517 is 715886941.

It is a cyclic number.

It is not a de Polignac number, because 149688517 - 2³ = 149688509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149688017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6288 + ... + 18409.

It is an arithmetic number, because the mean of its divisors is an integer number (11114100).

Almost surely, 2^149688517 is an apocalyptic number.

It is an amenable number.

149688517 is a deficient number, since it is larger than the sum of its proper divisors (28137083).

149688517 is a wasteful number, since it uses less digits than its factorization.

149688517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24756.

The product of its digits is 483840, while the sum is 49.

The square root of 149688517 is about 12234.7258653392. The cubic root of 149688517 is about 530.9612518614.

The spelling of 149688517 in words is "one hundred forty-nine million, six hundred eighty-eight thousand, five hundred seventeen".