149877731 has 4 divisors (see below), whose sum is σ = 150588264. Its totient is φ = 149167200.

The previous prime is 149877709. The next prime is 149877733. The reversal of 149877731 is 137778941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149877731 is a prime.

It is a super-2 number, since 2×149877731² = 44926668499416722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149877733) 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, 354950 + ... + 355371.

It is an arithmetic number, because the mean of its divisors is an integer number (37647066).

Almost surely, 2^149877731 is an apocalyptic number.

149877731 is a deficient number, since it is larger than the sum of its proper divisors (710533).

149877731 is an equidigital number, since it uses as much as digits as its factorization.

149877731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710532.

The product of its digits is 296352, while the sum is 47.

The square root of 149877731 is about 12242.4560852796. The cubic root of 149877731 is about 531.1848784582.

The spelling of 149877731 in words is "one hundred forty-nine million, eight hundred seventy-seven thousand, seven hundred thirty-one".