91611361 has 2 divisors, whose sum is σ = 91611362. Its totient is φ = 91611360.

The previous prime is 91611341. The next prime is 91611389. The reversal of 91611361 is 16311619.

It is an a-pointer prime, because the next prime (91611389) can be obtained adding 91611361 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90611361 + 1000000 = 9519^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 91611361 - 2¹¹ = 91609313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91611301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45805680 + 45805681.

It is an arithmetic number, because the mean of its divisors is an integer number (45805681).

Almost surely, 2^91611361 is an apocalyptic number.

It is an amenable number.

91611361 is a deficient number, since it is larger than the sum of its proper divisors (1).

91611361 is an equidigital number, since it uses as much as digits as its factorization.

91611361 is an evil number, because the sum of its binary digits is even.

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

The square root of 91611361 is about 9571.3823975432. The cubic root of 91611361 is about 450.7991741112.

The spelling of 91611361 in words is "ninety-one million, six hundred eleven thousand, three hundred sixty-one".