249474671 has 4 divisors (see below), whose sum is σ = 251295792. Its totient is φ = 247653552.

The previous prime is 249474619. The next prime is 249474679. The reversal of 249474671 is 176474942.

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 249474671 - 2¹⁸ = 249212527 is a prime.

It is a super-2 number, since 2×249474671² = 124475222941116482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249474679) 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, 910355 + ... + 910628.

It is an arithmetic number, because the mean of its divisors is an integer number (62823948).

Almost surely, 2^249474671 is an apocalyptic number.

249474671 is a deficient number, since it is larger than the sum of its proper divisors (1821121).

249474671 is a wasteful number, since it uses less digits than its factorization.

249474671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821120.

The product of its digits is 338688, while the sum is 44.

The square root of 249474671 is about 15794.7672030961. The cubic root of 249474671 is about 629.5189668083.

The spelling of 249474671 in words is "two hundred forty-nine million, four hundred seventy-four thousand, six hundred seventy-one".