149373881 has 4 divisors (see below), whose sum is σ = 150363264. Its totient is φ = 148384500.

The previous prime is 149373869. The next prime is 149373907. The reversal of 149373881 is 188373941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149373881 is a prime.

It is a super-2 number, since 2×149373881² = 44625112650004322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149373821) 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, 494465 + ... + 494766.

It is an arithmetic number, because the mean of its divisors is an integer number (37590816).

Almost surely, 2^149373881 is an apocalyptic number.

It is an amenable number.

149373881 is a deficient number, since it is larger than the sum of its proper divisors (989383).

149373881 is an equidigital number, since it uses as much as digits as its factorization.

149373881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989382.

The product of its digits is 145152, while the sum is 44.

The square root of 149373881 is about 12221.8607830395. The cubic root of 149373881 is about 530.5889750067.

The spelling of 149373881 in words is "one hundred forty-nine million, three hundred seventy-three thousand, eight hundred eighty-one".