249168069 has 12 divisors (see below), whose sum is σ = 373239776. Its totient is φ = 166111884.

The previous prime is 249168067. The next prime is 249168083. The reversal of 249168069 is 960861942.

It is a happy number.

It is not a de Polignac number, because 249168069 - 2¹ = 249168067 is a prime.

It is a super-2 number, since 2×249168069² = 124169453218377522, 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 (249168067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 512449 + ... + 512934.

Almost surely, 2^249168069 is an apocalyptic number.

It is an amenable number.

249168069 is a deficient number, since it is larger than the sum of its proper divisors (124071707).

249168069 is an equidigital number, since it uses as much as digits as its factorization.

249168069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025398 (or 1025386 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 249168069 is about 15785.0584097747. The cubic root of 249168069 is about 629.2609701449.

The spelling of 249168069 in words is "two hundred forty-nine million, one hundred sixty-eight thousand, sixty-nine".