91101061 has 2 divisors, whose sum is σ = 91101062. Its totient is φ = 91101060.

The previous prime is 91101053. The next prime is 91101083. The reversal of 91101061 is 16010119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48916036 + 42185025 = 6994^2 + 6495^2 .

It is a cyclic number.

It is not a de Polignac number, because 91101061 - 2³ = 91101053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91101041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550530 + 45550531.

It is an arithmetic number, because the mean of its divisors is an integer number (45550531).

Almost surely, 2^91101061 is an apocalyptic number.

It is an amenable number.

91101061 is a deficient number, since it is larger than the sum of its proper divisors (1).

91101061 is an equidigital number, since it uses as much as digits as its factorization.

91101061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 91101061 is about 9544.6875800101. The cubic root of 91101061 is about 449.9605907875.

The spelling of 91101061 in words is "ninety-one million, one hundred one thousand, sixty-one".