249913993 has 8 divisors (see below), whose sum is σ = 291693312. Its totient is φ = 209654016.

The previous prime is 249913969. The next prime is 249914009. The reversal of 249913993 is 399319942.

249913993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249913993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249913933) 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, 379480 + ... + 380137.

It is an arithmetic number, because the mean of its divisors is an integer number (36461664).

Almost surely, 2^249913993 is an apocalyptic number.

It is an amenable number.

249913993 is a deficient number, since it is larger than the sum of its proper divisors (41779319).

249913993 is an equidigital number, since it uses as much as digits as its factorization.

249913993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759671.

The product of its digits is 472392, while the sum is 49.

The square root of 249913993 is about 15808.6682867343. The cubic root of 249913993 is about 629.8882753083. Note that the first 3 decimals are identical.

The spelling of 249913993 in words is "two hundred forty-nine million, nine hundred thirteen thousand, nine hundred ninety-three".