11539897 has 4 divisors (see below), whose sum is σ = 12147280. Its totient is φ = 10932516.

The previous prime is 11539861. The next prime is 11539903. The reversal of 11539897 is 79893511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79893511 = 1451 ⋅55061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11539897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11539807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303663 + ... + 303700.

It is an arithmetic number, because the mean of its divisors is an integer number (3036820).

Almost surely, 2^11539897 is an apocalyptic number.

It is an amenable number.

11539897 is a deficient number, since it is larger than the sum of its proper divisors (607383).

11539897 is an equidigital number, since it uses as much as digits as its factorization.

11539897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607382.

The product of its digits is 68040, while the sum is 43.

The square root of 11539897 is about 3397.0423900799. The cubic root of 11539897 is about 225.9785984903.

The spelling of 11539897 in words is "eleven million, five hundred thirty-nine thousand, eight hundred ninety-seven".