249832921 has 8 divisors (see below), whose sum is σ = 270260480. Its totient is φ = 229578192.

The previous prime is 249832897. The next prime is 249832927. The reversal of 249832921 is 129238942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249832921 - 2⁵ = 249832889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249832927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40191 + ... + 45988.

It is an arithmetic number, because the mean of its divisors is an integer number (33782560).

Almost surely, 2^249832921 is an apocalyptic number.

It is an amenable number.

249832921 is a deficient number, since it is larger than the sum of its proper divisors (20427559).

249832921 is a wasteful number, since it uses less digits than its factorization.

249832921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86415.

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

The square root of 249832921 is about 15806.1039158927. The cubic root of 249832921 is about 629.8201561065.

The spelling of 249832921 in words is "two hundred forty-nine million, eight hundred thirty-two thousand, nine hundred twenty-one".