11613961 has 4 divisors (see below), whose sum is σ = 11631892. Its totient is φ = 11596032.

The previous prime is 11613937. The next prime is 11613977. The reversal of 11613961 is 16931611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1729225 + 9884736 = 1315^2 + 3144^2 .

It is a cyclic number.

It is not a de Polignac number, because 11613961 - 2²¹ = 9516809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11613911) 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, 7956 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (2907973).

Almost surely, 2^11613961 is an apocalyptic number.

It is an amenable number.

11613961 is a deficient number, since it is larger than the sum of its proper divisors (17931).

11613961 is an equidigital number, since it uses as much as digits as its factorization.

11613961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930.

The product of its digits is 972, while the sum is 28.

The square root of 11613961 is about 3407.9262022526. The cubic root of 11613961 is about 226.4610175803.

The spelling of 11613961 in words is "eleven million, six hundred thirteen thousand, nine hundred sixty-one".