249697023 has 4 divisors (see below), whose sum is σ = 332929368. Its totient is φ = 166464680.

The previous prime is 249697009. The next prime is 249697043. The reversal of 249697023 is 320796942.

It is a happy number.

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 249697023 - 2⁹ = 249696511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249697043) 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, 41616168 + ... + 41616173.

It is an arithmetic number, because the mean of its divisors is an integer number (83232342).

Almost surely, 2^249697023 is an apocalyptic number.

249697023 is a deficient number, since it is larger than the sum of its proper divisors (83232345).

249697023 is an equidigital number, since it uses as much as digits as its factorization.

249697023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83232344.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 249697023 is about 15801.8044222804. The cubic root of 249697023 is about 629.7059373408.

The spelling of 249697023 in words is "two hundred forty-nine million, six hundred ninety-seven thousand, twenty-three".