23491193 has 4 divisors (see below), whose sum is σ = 25626768. Its totient is φ = 21355620.

The previous prime is 23491187. The next prime is 23491199. The reversal of 23491193 is 39119432.

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 an interprime number because it is at equal distance from previous prime (23491187) and next prime (23491199).

It is not a de Polignac number, because 23491193 - 2⁶ = 23491129 is a prime.

It is a super-4 number, since 4×23491193⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23491199) 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, 1067771 + ... + 1067792.

It is an arithmetic number, because the mean of its divisors is an integer number (6406692).

Almost surely, 2^23491193 is an apocalyptic number.

It is an amenable number.

23491193 is a deficient number, since it is larger than the sum of its proper divisors (2135575).

23491193 is a wasteful number, since it uses less digits than its factorization.

23491193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135574.

The product of its digits is 5832, while the sum is 32.

The square root of 23491193 is about 4846.7713996020. The cubic root of 23491193 is about 286.3969295846.

The spelling of 23491193 in words is "twenty-three million, four hundred ninety-one thousand, one hundred ninety-three".