11439731 has 2 divisors, whose sum is σ = 11439732. Its totient is φ = 11439730.

The previous prime is 11439721. The next prime is 11439749. The reversal of 11439731 is 13793411.

It is a happy number.

11439731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11439731 is a prime.

It is a super-2 number, since 2×11439731² = 261734890704722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11439694 and 11439703.

It is not a weakly prime, because it can be changed into another prime (11439721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719865 + 5719866.

It is an arithmetic number, because the mean of its divisors is an integer number (5719866).

Almost surely, 2^11439731 is an apocalyptic number.

11439731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11439731 is an equidigital number, since it uses as much as digits as its factorization.

11439731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 11439731 is about 3382.2671390652. The cubic root of 11439731 is about 225.3228681596.

The spelling of 11439731 in words is "eleven million, four hundred thirty-nine thousand, seven hundred thirty-one".