149474823 has 4 divisors (see below), whose sum is σ = 199299768. Its totient is φ = 99649880.

The previous prime is 149474821. The next prime is 149474869. The reversal of 149474823 is 328474941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328474941 = 3 ⋅109491647.

It is a cyclic number.

It is not a de Polignac number, because 149474823 - 2¹ = 149474821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149474821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24912468 + ... + 24912473.

It is an arithmetic number, because the mean of its divisors is an integer number (49824942).

Almost surely, 2^149474823 is an apocalyptic number.

149474823 is a deficient number, since it is larger than the sum of its proper divisors (49824945).

149474823 is an equidigital number, since it uses as much as digits as its factorization.

149474823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49824944.

The product of its digits is 193536, while the sum is 42.

The square root of 149474823 is about 12225.9896531937. The cubic root of 149474823 is about 530.7084663396.

The spelling of 149474823 in words is "one hundred forty-nine million, four hundred seventy-four thousand, eight hundred twenty-three".