249268945 has 4 divisors (see below), whose sum is σ = 299122740. Its totient is φ = 199415152.

The previous prime is 249268933. The next prime is 249268973. The reversal of 249268945 is 549862942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98863249 + 150405696 = 9943^2 + 12264^2 .

It is a cyclic number.

It is not a de Polignac number, because 249268945 - 2⁵ = 249268913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24926890 + ... + 24926899.

It is an arithmetic number, because the mean of its divisors is an integer number (74780685).

Almost surely, 2^249268945 is an apocalyptic number.

It is an amenable number.

249268945 is a deficient number, since it is larger than the sum of its proper divisors (49853795).

249268945 is an equidigital number, since it uses as much as digits as its factorization.

249268945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49853794.

The product of its digits is 1244160, while the sum is 49.

The square root of 249268945 is about 15788.2533866163. The cubic root of 249268945 is about 629.3458777142.

The spelling of 249268945 in words is "two hundred forty-nine million, two hundred sixty-eight thousand, nine hundred forty-five".