11439397 has 4 divisors (see below), whose sum is σ = 11448076. Its totient is φ = 11430720.

The previous prime is 11439383. The next prime is 11439409. The reversal of 11439397 is 79393411.

11439397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79393411 = 863 ⋅91997.

It can be written as a sum of positive squares in 2 ways, for example, as 10666756 + 772641 = 3266^2 + 879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11439397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11439347) 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, 1908 + ... + 5149.

It is an arithmetic number, because the mean of its divisors is an integer number (2862019).

Almost surely, 2^11439397 is an apocalyptic number.

It is an amenable number.

11439397 is a deficient number, since it is larger than the sum of its proper divisors (8679).

11439397 is an equidigital number, since it uses as much as digits as its factorization.

11439397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678.

The product of its digits is 20412, while the sum is 37.

The square root of 11439397 is about 3382.2177635392. The cubic root of 11439397 is about 225.3206752593.

The spelling of 11439397 in words is "eleven million, four hundred thirty-nine thousand, three hundred ninety-seven".