23498981 has 16 divisors (see below), whose sum is σ = 27667008. Its totient is φ = 19718400.

The previous prime is 23498971. The next prime is 23498987. The reversal of 23498981 is 18989432.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23498981 is a prime.

It is a super-2 number, since 2×23498981² = 1104404216076722, 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 (23498987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8726 + ... + 11096.

It is an arithmetic number, because the mean of its divisors is an integer number (1729188).

Almost surely, 2^23498981 is an apocalyptic number.

It is an amenable number.

23498981 is a deficient number, since it is larger than the sum of its proper divisors (4168027).

23498981 is a wasteful number, since it uses less digits than its factorization.

23498981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452.

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

The square root of 23498981 is about 4847.5747544520. The cubic root of 23498981 is about 286.4285756692.

The spelling of 23498981 in words is "twenty-three million, four hundred ninety-eight thousand, nine hundred eighty-one".