11561197 has 2 divisors, whose sum is σ = 11561198. Its totient is φ = 11561196.

The previous prime is 11561161. The next prime is 11561213. The reversal of 11561197 is 79116511.

11561197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6869641 + 4691556 = 2621^2 + 2166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561197 is a prime.

It is a super-2 number, since 2×11561197² = 267322552145618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780598 + 5780599.

It is an arithmetic number, because the mean of its divisors is an integer number (5780599).

Almost surely, 2^11561197 is an apocalyptic number.

It is an amenable number.

11561197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561197 is an equidigital number, since it uses as much as digits as its factorization.

11561197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 31.

The square root of 11561197 is about 3400.1760248552. The cubic root of 11561197 is about 226.1175479032.

The spelling of 11561197 in words is "eleven million, five hundred sixty-one thousand, one hundred ninety-seven".