249870973 has 4 divisors (see below), whose sum is σ = 272586528. Its totient is φ = 227155420.

The previous prime is 249870961. The next prime is 249870983. The reversal of 249870973 is 379078942.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249870973 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 (249870923) 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, 11357761 + ... + 11357782.

It is an arithmetic number, because the mean of its divisors is an integer number (68146632).

Almost surely, 2^249870973 is an apocalyptic number.

It is an amenable number.

249870973 is a deficient number, since it is larger than the sum of its proper divisors (22715555).

249870973 is a wasteful number, since it uses less digits than its factorization.

249870973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715554.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 249870973 is about 15807.3075822545. The cubic root of 249870973 is about 629.8521304087.

The spelling of 249870973 in words is "two hundred forty-nine million, eight hundred seventy thousand, nine hundred seventy-three".