249441869 has 4 divisors (see below), whose sum is σ = 249519744. Its totient is φ = 249363996.

The previous prime is 249441853. The next prime is 249441889. The reversal of 249441869 is 968144942.

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 not a de Polignac number, because 249441869 - 2⁴ = 249441853 is a prime.

It is a super-2 number, since 2×249441869² = 124442492020426322, 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 (249441889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33917 + ... + 40610.

It is an arithmetic number, because the mean of its divisors is an integer number (62379936).

Almost surely, 2^249441869 is an apocalyptic number.

It is an amenable number.

249441869 is a deficient number, since it is larger than the sum of its proper divisors (77875).

249441869 is an equidigital number, since it uses as much as digits as its factorization.

249441869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77874.

The product of its digits is 497664, while the sum is 47.

The square root of 249441869 is about 15793.7287870851. The cubic root of 249441869 is about 629.4913749808.

The spelling of 249441869 in words is "two hundred forty-nine million, four hundred forty-one thousand, eight hundred sixty-nine".