91235061 has 6 divisors (see below), whose sum is σ = 131783990. Its totient is φ = 60823368.

The previous prime is 91235059. The next prime is 91235069. The reversal of 91235061 is 16053219.

It can be written as a sum of positive squares in only one way, i.e., 66732561 + 24502500 = 8169^2 + 4950^2 .

It is not a de Polignac number, because 91235061 - 2¹ = 91235059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91235069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5068606 + ... + 5068623.

Almost surely, 2^91235061 is an apocalyptic number.

It is an amenable number.

91235061 is a deficient number, since it is larger than the sum of its proper divisors (40548929).

91235061 is a wasteful number, since it uses less digits than its factorization.

91235061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10137235 (or 10137232 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 91235061 is about 9551.7046122669. The cubic root of 91235061 is about 450.1810974799.

The spelling of 91235061 in words is "ninety-one million, two hundred thirty-five thousand, sixty-one".