23161493 has 4 divisors (see below), whose sum is σ = 23194080. Its totient is φ = 23128908.

The previous prime is 23161451. The next prime is 23161499. The reversal of 23161493 is 39416132.

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 23161493 - 2¹² = 23157397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161499) 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, 15203 + ... + 16656.

It is an arithmetic number, because the mean of its divisors is an integer number (5798520).

Almost surely, 2^23161493 is an apocalyptic number.

It is an amenable number.

23161493 is a deficient number, since it is larger than the sum of its proper divisors (32587).

23161493 is an equidigital number, since it uses as much as digits as its factorization.

23161493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32586.

The product of its digits is 3888, while the sum is 29.

The square root of 23161493 is about 4812.6388811129. The cubic root of 23161493 is about 285.0507470935.

The spelling of 23161493 in words is "twenty-three million, one hundred sixty-one thousand, four hundred ninety-three".