249387999923 has 2 divisors, whose sum is σ = 249387999924. Its totient is φ = 249387999922.

The previous prime is 249387999869. The next prime is 249387999943. The reversal of 249387999923 is 329999783942.

249387999923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249387999923 - 2²⁰ = 249386951347 is a prime.

It is not a weakly prime, because it can be changed into another prime (249387999943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124693999961 + 124693999962.

It is an arithmetic number, because the mean of its divisors is an integer number (124693999962).

Almost surely, 2^249387999923 is an apocalyptic number.

249387999923 is a deficient number, since it is larger than the sum of its proper divisors (1).

249387999923 is an equidigital number, since it uses as much as digits as its factorization.

249387999923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476171136, while the sum is 74.

The spelling of 249387999923 in words is "two hundred forty-nine billion, three hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred twenty-three".