149979331 has 4 divisors (see below), whose sum is σ = 157873000. Its totient is φ = 142085664.

The previous prime is 149979301. The next prime is 149979337. The reversal of 149979331 is 133979941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133979941 = 17 ⋅7881173.

It is a cyclic number.

It is not a de Polignac number, because 149979331 - 2¹¹ = 149977283 is a prime.

It is a super-2 number, since 2×149979331² = 44987599454415122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149979337) 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, 3946806 + ... + 3946843.

It is an arithmetic number, because the mean of its divisors is an integer number (39468250).

Almost surely, 2^149979331 is an apocalyptic number.

149979331 is a deficient number, since it is larger than the sum of its proper divisors (7893669).

149979331 is an equidigital number, since it uses as much as digits as its factorization.

149979331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893668.

The product of its digits is 183708, while the sum is 46.

The square root of 149979331 is about 12246.6048764545. The cubic root of 149979331 is about 531.3048789259.

The spelling of 149979331 in words is "one hundred forty-nine million, nine hundred seventy-nine thousand, three hundred thirty-one".