249653023 has 4 divisors (see below), whose sum is σ = 256400440. Its totient is φ = 242905608.

The previous prime is 249652993. The next prime is 249653029. The reversal of 249653023 is 320356942.

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

It is a cyclic number.

It is not a de Polignac number, because 249653023 - 2²¹ = 247555871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249653023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249653029) 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 3 ways as a sum of consecutive naturals, for example, 3373653 + ... + 3373726.

It is an arithmetic number, because the mean of its divisors is an integer number (64100110).

Almost surely, 2^249653023 is an apocalyptic number.

249653023 is a deficient number, since it is larger than the sum of its proper divisors (6747417).

249653023 is an equidigital number, since it uses as much as digits as its factorization.

249653023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6747416.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 249653023 is about 15800.4121148785. The cubic root of 249653023 is about 629.6689475942.

The spelling of 249653023 in words is "two hundred forty-nine million, six hundred fifty-three thousand, twenty-three".