249464909 has 4 divisors (see below), whose sum is σ = 250771200. Its totient is φ = 248158620.

The previous prime is 249464903. The next prime is 249464911. The reversal of 249464909 is 909464942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249464909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249464903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652859 + ... + 653240.

It is an arithmetic number, because the mean of its divisors is an integer number (62692800).

Almost surely, 2^249464909 is an apocalyptic number.

It is an amenable number.

249464909 is a deficient number, since it is larger than the sum of its proper divisors (1306291).

249464909 is a wasteful number, since it uses less digits than its factorization.

249464909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306290.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 249464909 is about 15794.4581736760. The cubic root of 249464909 is about 629.5107556283.

The spelling of 249464909 in words is "two hundred forty-nine million, four hundred sixty-four thousand, nine hundred nine".