149890223 has 4 divisors (see below), whose sum is σ = 171303120. Its totient is φ = 128477328.

The previous prime is 149890199. The next prime is 149890229. The reversal of 149890223 is 322098941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322098941 = 5399 ⋅59659.

It is not a de Polignac number, because 149890223 - 2⁸ = 149889967 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 (149890229) 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, 10706438 + ... + 10706451.

It is an arithmetic number, because the mean of its divisors is an integer number (42825780).

Almost surely, 2^149890223 is an apocalyptic number.

149890223 is a deficient number, since it is larger than the sum of its proper divisors (21412897).

149890223 is an equidigital number, since it uses as much as digits as its factorization.

149890223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21412896.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 149890223 is about 12242.9662663915. The cubic root of 149890223 is about 531.1996357699.

The spelling of 149890223 in words is "one hundred forty-nine million, eight hundred ninety thousand, two hundred twenty-three".