23572123987 has 2 divisors, whose sum is σ = 23572123988. Its totient is φ = 23572123986.

The previous prime is 23572123961. The next prime is 23572123997. The reversal of 23572123987 is 78932127532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23572123987 - 2¹⁹ = 23571599699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23572123987.

It is not a weakly prime, because it can be changed into another prime (23572123907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11786061993 + 11786061994.

It is an arithmetic number, because the mean of its divisors is an integer number (11786061994).

Almost surely, 2^23572123987 is an apocalyptic number.

23572123987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23572123987 is an equidigital number, since it uses as much as digits as its factorization.

23572123987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The spelling of 23572123987 in words is "twenty-three billion, five hundred seventy-two million, one hundred twenty-three thousand, nine hundred eighty-seven".