11539997 has 16 divisors (see below), whose sum is σ = 13866240. Its totient is φ = 9389952.

The previous prime is 11539981. The next prime is 11540033. The reversal of 11539997 is 79993511.

It is a cyclic number.

It is not a de Polignac number, because 11539997 - 2⁴ = 11539981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11539907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36713 + ... + 37025.

It is an arithmetic number, because the mean of its divisors is an integer number (866640).

Almost surely, 2^11539997 is an apocalyptic number.

It is an amenable number.

11539997 is a deficient number, since it is larger than the sum of its proper divisors (2326243).

11539997 is a wasteful number, since it uses less digits than its factorization.

11539997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its digits is 76545, while the sum is 44.

The square root of 11539997 is about 3397.0571087340. The cubic root of 11539997 is about 225.9792512343.

The spelling of 11539997 in words is "eleven million, five hundred thirty-nine thousand, nine hundred ninety-seven".