11893721 has 6 divisors (see below), whose sum is σ = 13835610. Its totient is φ = 10194576.

The previous prime is 11893711. The next prime is 11893729. The reversal of 11893721 is 12739811.

It can be written as a sum of positive squares in only one way, i.e., 9834496 + 2059225 = 3136^2 + 1435^2 .

It is not a de Polignac number, because 11893721 - 2⁶ = 11893657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11893729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121316 + ... + 121413.

It is an arithmetic number, because the mean of its divisors is an integer number (2305935).

Almost surely, 2^11893721 is an apocalyptic number.

It is an amenable number.

11893721 is a deficient number, since it is larger than the sum of its proper divisors (1941889).

11893721 is an equidigital number, since it uses as much as digits as its factorization.

11893721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242743 (or 242736 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

The square root of 11893721 is about 3448.7274464649. The cubic root of 11893721 is about 228.2649594887.

It can be divided in two parts, 118 and 93721, that added together give a palindrome (93839).

The spelling of 11893721 in words is "eleven million, eight hundred ninety-three thousand, seven hundred twenty-one".