11890731 has 4 divisors (see below), whose sum is σ = 15854312. Its totient is φ = 7927152.

The previous prime is 11890721. The next prime is 11890733. The reversal of 11890731 is 13709811.

11890731 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11890731 - 2¹⁰ = 11889707 is a prime.

It is a super-2 number, since 2×11890731² = 282778967428722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11890733) 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, 1981786 + ... + 1981791.

It is an arithmetic number, because the mean of its divisors is an integer number (3963578).

Almost surely, 2^11890731 is an apocalyptic number.

11890731 is a deficient number, since it is larger than the sum of its proper divisors (3963581).

11890731 is an equidigital number, since it uses as much as digits as its factorization.

11890731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963580.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 11890731 is about 3448.2939259872. The cubic root of 11890731 is about 228.2458298031.

It can be divided in two parts, 11890 and 731, that added together give a palindrome (12621).

The spelling of 11890731 in words is "eleven million, eight hundred ninety thousand, seven hundred thirty-one".