249923505 has 32 divisors (see below), whose sum is σ = 432399744. Its totient is φ = 122535936.

The previous prime is 249923449. The next prime is 249923521. The reversal of 249923505 is 505329942.

It is not a de Polignac number, because 249923505 - 2⁶ = 249923441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47622 + ... + 52608.

It is an arithmetic number, because the mean of its divisors is an integer number (13512492).

Almost surely, 2^249923505 is an apocalyptic number.

It is an amenable number.

249923505 is a deficient number, since it is larger than the sum of its proper divisors (182476239).

249923505 is a wasteful number, since it uses less digits than its factorization.

249923505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 249923505 is about 15808.9691314772. The cubic root of 249923505 is about 629.8962666193.

The spelling of 249923505 in words is "two hundred forty-nine million, nine hundred twenty-three thousand, five hundred five".