91065061 has 2 divisors, whose sum is σ = 91065062. Its totient is φ = 91065060.

The previous prime is 91065053. The next prime is 91065071. The reversal of 91065061 is 16056019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58232161 + 32832900 = 7631^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 91065061 - 2³ = 91065053 is a prime.

It is a Chen prime.

It is equal to p_5275207 and since 91065061 and 5275207 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91065001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45532530 + 45532531.

It is an arithmetic number, because the mean of its divisors is an integer number (45532531).

Almost surely, 2^91065061 is an apocalyptic number.

It is an amenable number.

91065061 is a deficient number, since it is larger than the sum of its proper divisors (1).

91065061 is an equidigital number, since it uses as much as digits as its factorization.

91065061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 91065061 is about 9542.8015278533. The cubic root of 91065061 is about 449.9013133387.

It can be divided in two parts, 9 and 1065061, that added together give a triangular number (1065070 = T₁₄₅₉).

The spelling of 91065061 in words is "ninety-one million, sixty-five thousand, sixty-one".