249999573 has 4 divisors (see below), whose sum is σ = 333332768. Its totient is φ = 166666380.

The previous prime is 249999559. The next prime is 249999599. The reversal of 249999573 is 375999942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 249999573 - 2⁴ = 249999557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249994573) 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, 41666593 + ... + 41666598.

It is an arithmetic number, because the mean of its divisors is an integer number (83333192).

Almost surely, 2^249999573 is an apocalyptic number.

It is an amenable number.

249999573 is a deficient number, since it is larger than the sum of its proper divisors (83333195).

249999573 is an equidigital number, since it uses as much as digits as its factorization.

249999573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83333194.

The product of its digits is 5511240, while the sum is 57.

The square root of 249999573 is about 15811.3747979105. The cubic root of 249999573 is about 629.9601662897.

The spelling of 249999573 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, five hundred seventy-three".