91243061 has 16 divisors (see below), whose sum is σ = 112689024. Its totient is φ = 71941824.

The previous prime is 91243049. The next prime is 91243091. The reversal of 91243061 is 16034219.

It is a cyclic number.

It is not a de Polignac number, because 91243061 - 2¹⁴ = 91226677 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91243061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91243091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27266 + ... + 30428.

It is an arithmetic number, because the mean of its divisors is an integer number (7043064).

Almost surely, 2^91243061 is an apocalyptic number.

91243061 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

91243061 is a deficient number, since it is larger than the sum of its proper divisors (21445963).

91243061 is a wasteful number, since it uses less digits than its factorization.

91243061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 91243061 is about 9552.1233765064. The cubic root of 91243061 is about 450.1942552268.

The spelling of 91243061 in words is "ninety-one million, two hundred forty-three thousand, sixty-one".