23161792387 has 4 divisors (see below), whose sum is σ = 23163514920. Its totient is φ = 23160069856.

The previous prime is 23161792369. The next prime is 23161792397. The reversal of 23161792387 is 78329716132.

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-23161792387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23161792387.

It is not an unprimeable number, because it can be changed into a prime (23161792397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840937 + ... + 868042.

It is an arithmetic number, because the mean of its divisors is an integer number (5790878730).

Almost surely, 2^23161792387 is an apocalyptic number.

23161792387 is a deficient number, since it is larger than the sum of its proper divisors (1722533).

23161792387 is a wasteful number, since it uses less digits than its factorization.

23161792387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722532.

The product of its digits is 762048, while the sum is 49.

The spelling of 23161792387 in words is "twenty-three billion, one hundred sixty-one million, seven hundred ninety-two thousand, three hundred eighty-seven".