11739897 has 20 divisors (see below), whose sum is σ = 18888100. Its totient is φ = 7223904.

The previous prime is 11739883. The next prime is 11739907. The reversal of 11739897 is 79893711.

It can be written as a sum of positive squares in 2 ways, for example, as 2595321 + 9144576 = 1611^2 + 3024^2 .

It is not a de Polignac number, because 11739897 - 2¹⁰ = 11738873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11739697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4522 + ... + 6627.

It is an arithmetic number, because the mean of its divisors is an integer number (944405).

Almost surely, 2^11739897 is an apocalyptic number.

It is an amenable number.

11739897 is a deficient number, since it is larger than the sum of its proper divisors (7148203).

11739897 is a wasteful number, since it uses less digits than its factorization.

11739897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174 (or 11165 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 11739897 is about 3426.3533092780. The cubic root of 11739897 is about 227.2766200885.

The spelling of 11739897 in words is "eleven million, seven hundred thirty-nine thousand, eight hundred ninety-seven".