149172023 has 48 divisors (see below), whose sum is σ = 207799200. Its totient is φ = 105235200.

The previous prime is 149172019. The next prime is 149172029. The reversal of 149172023 is 320271941.

It is not a de Polignac number, because 149172023 - 2² = 149172019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149172029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427253 + ... + 427601.

It is an arithmetic number, because the mean of its divisors is an integer number (4329150).

Almost surely, 2^149172023 is an apocalyptic number.

149172023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

149172023 is a deficient number, since it is larger than the sum of its proper divisors (58627177).

149172023 is a wasteful number, since it uses less digits than its factorization.

149172023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 149172023 is about 12213.5999197616. The cubic root of 149172023 is about 530.3498615595.

The spelling of 149172023 in words is "one hundred forty-nine million, one hundred seventy-two thousand, twenty-three".