249388445 has 8 divisors (see below), whose sum is σ = 306565560. Its totient is φ = 194644480.

The previous prime is 249388427. The next prime is 249388463. The reversal of 249388445 is 544883942.

It is an interprime number because it is at equal distance from previous prime (249388427) and next prime (249388463).

It can be written as a sum of positive squares in 4 ways, for example, as 3463321 + 245925124 = 1861^2 + 15682^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249388445 - 2⁸ = 249388189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249388445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608060 + ... + 608469.

It is an arithmetic number, because the mean of its divisors is an integer number (38320695).

Almost surely, 2^249388445 is an apocalyptic number.

It is an amenable number.

249388445 is a deficient number, since it is larger than the sum of its proper divisors (57177115).

249388445 is a wasteful number, since it uses less digits than its factorization.

249388445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216575.

The product of its digits is 1105920, while the sum is 47.

The square root of 249388445 is about 15792.0373923063. The cubic root of 249388445 is about 629.4464315123.

The spelling of 249388445 in words is "two hundred forty-nine million, three hundred eighty-eight thousand, four hundred forty-five".