249683161 has 16 divisors (see below), whose sum is σ = 323478400. Its totient is φ = 187152768.

The previous prime is 249683149. The next prime is 249683177. The reversal of 249683161 is 161386942.

It is a cyclic number.

It is not a de Polignac number, because 249683161 - 2¹⁵ = 249650393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249683761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 70476 + ... + 73933.

It is an arithmetic number, because the mean of its divisors is an integer number (20217400).

Almost surely, 2^249683161 is an apocalyptic number.

It is an amenable number.

249683161 is a deficient number, since it is larger than the sum of its proper divisors (73795239).

249683161 is a wasteful number, since it uses less digits than its factorization.

249683161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144448.

The product of its digits is 62208, while the sum is 40.

The square root of 249683161 is about 15801.3657953988. The cubic root of 249683161 is about 629.6942843582.

The spelling of 249683161 in words is "two hundred forty-nine million, six hundred eighty-three thousand, one hundred sixty-one".