249997164 has 12 divisors (see below), whose sum is σ = 583326744. Its totient is φ = 83332384.

The previous prime is 249997151. The next prime is 249997201. The reversal of 249997164 is 461799942.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10416537 + ... + 10416560.

It is an arithmetic number, because the mean of its divisors is an integer number (48610562).

Almost surely, 2^249997164 is an apocalyptic number.

It is an amenable number.

249997164 is an abundant number, since it is smaller than the sum of its proper divisors (333329580).

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

249997164 is a wasteful number, since it uses less digits than its factorization.

249997164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20833104 (or 20833102 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 249997164 is about 15811.2986183931. The cubic root of 249997164 is about 629.9581428477.

The spelling of 249997164 in words is "two hundred forty-nine million, nine hundred ninety-seven thousand, one hundred sixty-four".