11913597 has 6 divisors (see below), whose sum is σ = 17208542. Its totient is φ = 7942392.

The previous prime is 11913581. The next prime is 11913611. The reversal of 11913597 is 79531911.

It can be written as a sum of positive squares in only one way, i.e., 9308601 + 2604996 = 3051^2 + 1614^2 .

It is not a de Polignac number, because 11913597 - 2⁴ = 11913581 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 (11913197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661858 + ... + 661875.

Almost surely, 2^11913597 is an apocalyptic number.

It is an amenable number.

11913597 is a deficient number, since it is larger than the sum of its proper divisors (5294945).

11913597 is a wasteful number, since it uses less digits than its factorization.

11913597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323739 (or 1323736 counting only the distinct ones).

The product of its digits is 8505, while the sum is 36.

The square root of 11913597 is about 3451.6078861887. The cubic root of 11913597 is about 228.3920424924.

The spelling of 11913597 in words is "eleven million, nine hundred thirteen thousand, five hundred ninety-seven".