91101013 has 2 divisors, whose sum is σ = 91101014. Its totient is φ = 91101012.

The previous prime is 91100963. The next prime is 91101019. The reversal of 91101013 is 31010119.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83046769 + 8054244 = 9113^2 + 2838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91101013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91101019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550506 + 45550507.

It is an arithmetic number, because the mean of its divisors is an integer number (45550507).

Almost surely, 2^91101013 is an apocalyptic number.

It is an amenable number.

91101013 is a deficient number, since it is larger than the sum of its proper divisors (1).

91101013 is an equidigital number, since it uses as much as digits as its factorization.

91101013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 91101013 is about 9544.6850655221. The cubic root of 91101013 is about 449.9605117613.

The spelling of 91101013 in words is "ninety-one million, one hundred one thousand, thirteen".