249963523 has 4 divisors (see below), whose sum is σ = 253484208. Its totient is φ = 246442840.

The previous prime is 249963481. The next prime is 249963551. The reversal of 249963523 is 325369942.

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 249963523 - 2¹³ = 249955331 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 249963523.

It is not an unprimeable number, because it can be changed into a prime (249973523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760236 + ... + 1760377.

It is an arithmetic number, because the mean of its divisors is an integer number (63371052).

Almost surely, 2^249963523 is an apocalyptic number.

249963523 is a deficient number, since it is larger than the sum of its proper divisors (3520685).

249963523 is an equidigital number, since it uses as much as digits as its factorization.

249963523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520684.

The product of its digits is 349920, while the sum is 43.

The square root of 249963523 is about 15810.2347547404. The cubic root of 249963523 is about 629.9298846971.

The spelling of 249963523 in words is "two hundred forty-nine million, nine hundred sixty-three thousand, five hundred twenty-three".