149871723 has 4 divisors (see below), whose sum is σ = 199828968. Its totient is φ = 99914480.

The previous prime is 149871707. The next prime is 149871731. The reversal of 149871723 is 327178941.

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

It is a cyclic number.

It is not a de Polignac number, because 149871723 - 2⁴ = 149871707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149871023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24978618 + ... + 24978623.

It is an arithmetic number, because the mean of its divisors is an integer number (49957242).

Almost surely, 2^149871723 is an apocalyptic number.

149871723 is a deficient number, since it is larger than the sum of its proper divisors (49957245).

149871723 is an equidigital number, since it uses as much as digits as its factorization.

149871723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49957244.

The product of its digits is 84672, while the sum is 42.

The square root of 149871723 is about 12242.2107072211. The cubic root of 149871723 is about 531.1777806695.

The spelling of 149871723 in words is "one hundred forty-nine million, eight hundred seventy-one thousand, seven hundred twenty-three".