23149619 has 4 divisors (see below), whose sum is σ = 24368040. Its totient is φ = 21931200.

The previous prime is 23149589. The next prime is 23149663. The reversal of 23149619 is 91694132.

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 23149619 - 2⁸ = 23149363 is a prime.

It is a super-2 number, since 2×23149619² = 1071809719690322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23149319) 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, 609182 + ... + 609219.

It is an arithmetic number, because the mean of its divisors is an integer number (6092010).

Almost surely, 2^23149619 is an apocalyptic number.

23149619 is a deficient number, since it is larger than the sum of its proper divisors (1218421).

23149619 is a wasteful number, since it uses less digits than its factorization.

23149619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218420.

The product of its digits is 11664, while the sum is 35.

The square root of 23149619 is about 4811.4050962271. The cubic root of 23149619 is about 285.0020272760.

The spelling of 23149619 in words is "twenty-three million, one hundred forty-nine thousand, six hundred nineteen".