23162991 has 8 divisors (see below), whose sum is σ = 31637424. Its totient is φ = 15065280.

The previous prime is 23162941. The next prime is 23163013. The reversal of 23162991 is 19926132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-23162991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23162911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94036 + ... + 94281.

It is an arithmetic number, because the mean of its divisors is an integer number (3954678).

Almost surely, 2^23162991 is an apocalyptic number.

23162991 is a deficient number, since it is larger than the sum of its proper divisors (8474433).

23162991 is a wasteful number, since it uses less digits than its factorization.

23162991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188361.

The product of its digits is 5832, while the sum is 33.

The square root of 23162991 is about 4812.7945104689. The cubic root of 23162991 is about 285.0568923049.

The spelling of 23162991 in words is "twenty-three million, one hundred sixty-two thousand, nine hundred ninety-one".