23097491 has 4 divisors (see below), whose sum is σ = 23263800. Its totient is φ = 22931184.

The previous prime is 23097479. The next prime is 23097593. The reversal of 23097491 is 19479032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23097491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23097401) 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, 82946 + ... + 83223.

It is an arithmetic number, because the mean of its divisors is an integer number (5815950).

Almost surely, 2^23097491 is an apocalyptic number.

23097491 is a deficient number, since it is larger than the sum of its proper divisors (166309).

23097491 is a wasteful number, since it uses less digits than its factorization.

23097491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166308.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 23097491 is about 4805.9849146663. The cubic root of 23097491 is about 284.7879452655.

The spelling of 23097491 in words is "twenty-three million, ninety-seven thousand, four hundred ninety-one".