249408091 has 8 divisors (see below), whose sum is σ = 258461280. Its totient is φ = 240385152.

The previous prime is 249408053. The next prime is 249408097. The reversal of 249408091 is 190804942.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 249408091 - 2⁹ = 249407579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249408091.

It is not an unprimeable number, because it can be changed into a prime (249408097) 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, 9946 + ... + 24448.

It is an arithmetic number, because the mean of its divisors is an integer number (32307660).

Almost surely, 2^249408091 is an apocalyptic number.

249408091 is a deficient number, since it is larger than the sum of its proper divisors (9053189).

249408091 is a wasteful number, since it uses less digits than its factorization.

249408091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15125.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 249408091 is about 15792.6594023933. The cubic root of 249408091 is about 629.4629596503.

The spelling of 249408091 in words is "two hundred forty-nine million, four hundred eight thousand, ninety-one".