11993257 has 4 divisors (see below), whose sum is σ = 12035920. Its totient is φ = 11950596.

The previous prime is 11993207. The next prime is 11993263. The reversal of 11993257 is 75239911.

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 11993257 - 2⁷ = 11993129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11993207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20907 + ... + 21472.

It is an arithmetic number, because the mean of its divisors is an integer number (3008980).

Almost surely, 2^11993257 is an apocalyptic number.

It is an amenable number.

11993257 is a deficient number, since it is larger than the sum of its proper divisors (42663).

11993257 is an equidigital number, since it uses as much as digits as its factorization.

11993257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42662.

The product of its digits is 17010, while the sum is 37.

The square root of 11993257 is about 3463.1282101591. The cubic root of 11993257 is about 228.8999582086.

The spelling of 11993257 in words is "eleven million, nine hundred ninety-three thousand, two hundred fifty-seven".