249888769 has 8 divisors (see below), whose sum is σ = 269724672. Its totient is φ = 230140560.

The previous prime is 249888731. The next prime is 249888773. The reversal of 249888769 is 967888942.

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

It is not a de Polignac number, because 249888769 - 2⁹ = 249888257 is a prime.

It is a super-2 number, since 2×249888769² = 124888793744670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249880769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15937 + ... + 27454.

It is an arithmetic number, because the mean of its divisors is an integer number (33715584).

It is a Proth number, since it is equal to 3813 ⋅ 2¹⁶ + 1 and 3813 < 2¹⁶.

Almost surely, 2^249888769 is an apocalyptic number.

It is an amenable number.

249888769 is a deficient number, since it is larger than the sum of its proper divisors (19835903).

249888769 is a wasteful number, since it uses less digits than its factorization.

249888769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43847.

The product of its digits is 13934592, while the sum is 61.

The square root of 249888769 is about 15807.8704764431. The cubic root of 249888769 is about 629.8670829023.

The spelling of 249888769 in words is "two hundred forty-nine million, eight hundred eighty-eight thousand, seven hundred sixty-nine".