11890491 has 4 divisors (see below), whose sum is σ = 15853992. Its totient is φ = 7926992.

The previous prime is 11890481. The next prime is 11890499. The reversal of 11890491 is 19409811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11890491 - 2⁷ = 11890363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11890499) 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, 1981746 + ... + 1981751.

It is an arithmetic number, because the mean of its divisors is an integer number (3963498).

Almost surely, 2^11890491 is an apocalyptic number.

11890491 is a deficient number, since it is larger than the sum of its proper divisors (3963501).

11890491 is an equidigital number, since it uses as much as digits as its factorization.

11890491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963500.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 11890491 is about 3448.2591259939. The cubic root of 11890491 is about 228.2442941709.

It can be divided in two parts, 118 and 90491, that added together give a palindrome (90609).

The spelling of 11890491 in words is "eleven million, eight hundred ninety thousand, four hundred ninety-one".