23898149 has 4 divisors (see below), whose sum is σ = 26070720. Its totient is φ = 21725580.

The previous prime is 23898139. The next prime is 23898151. The reversal of 23898149 is 94189832.

It is a happy number.

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 not a de Polignac number, because 23898149 - 2¹² = 23894053 is a prime.

It is a super-2 number, since 2×23898149² = 1142243051252402, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086269 + ... + 1086290.

It is an arithmetic number, because the mean of its divisors is an integer number (6517680).

Almost surely, 2^23898149 is an apocalyptic number.

It is an amenable number.

23898149 is a deficient number, since it is larger than the sum of its proper divisors (2172571).

23898149 is a wasteful number, since it uses less digits than its factorization.

23898149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172570.

The product of its digits is 124416, while the sum is 44.

The square root of 23898149 is about 4888.5733092591. The cubic root of 23898149 is about 288.0412950367.

The spelling of 23898149 in words is "twenty-three million, eight hundred ninety-eight thousand, one hundred forty-nine".