249861966 has 24 divisors (see below), whose sum is σ = 502481832. Its totient is φ = 82830000.

The previous prime is 249861947. The next prime is 249861973. The reversal of 249861966 is 669168942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377676 + ... + 378336.

It is an arithmetic number, because the mean of its divisors is an integer number (20936743).

Almost surely, 2^249861966 is an apocalyptic number.

249861966 is an abundant number, since it is smaller than the sum of its proper divisors (252619866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249861966 is an equidigital number, since it uses as much as digits as its factorization.

249861966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 917 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 249861966 is about 15807.0226798091. The cubic root of 249861966 is about 629.8445623076.

The spelling of 249861966 in words is "two hundred forty-nine million, eight hundred sixty-one thousand, nine hundred sixty-six".