11617961 has 2 divisors, whose sum is σ = 11617962. Its totient is φ = 11617960.

The previous prime is 11617939. The next prime is 11617973. The reversal of 11617961 is 16971611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7123561 + 4494400 = 2669^2 + 2120^2 .

It is an emirp because it is prime and its reverse (16971611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11617961 - 2⁶ = 11617897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11617561) 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 as a sum of consecutive naturals, namely, 5808980 + 5808981.

It is an arithmetic number, because the mean of its divisors is an integer number (5808981).

Almost surely, 2^11617961 is an apocalyptic number.

It is an amenable number.

11617961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11617961 is an equidigital number, since it uses as much as digits as its factorization.

11617961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 11617961 is about 3408.5130188984. The cubic root of 11617961 is about 226.4870133077.

The spelling of 11617961 in words is "eleven million, six hundred seventeen thousand, nine hundred sixty-one".