91542085 has 8 divisors (see below), whose sum is σ = 110486520. Its totient is φ = 72809664.

The previous prime is 91542083. The next prime is 91542097. The reversal of 91542085 is 58024519.

It can be written as a sum of positive squares in 4 ways, for example, as 7214596 + 84327489 = 2686^2 + 9183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91542085 - 2¹ = 91542083 is a prime.

It is a super-2 number, since 2×91542085² = 16759906652294450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91542085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91542083) 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 7 ways as a sum of consecutive naturals, for example, 52050 + ... + 53779.

It is an arithmetic number, because the mean of its divisors is an integer number (13810815).

Almost surely, 2^91542085 is an apocalyptic number.

It is an amenable number.

91542085 is a deficient number, since it is larger than the sum of its proper divisors (18944435).

91542085 is a wasteful number, since it uses less digits than its factorization.

91542085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106007.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 91542085 is about 9567.7628001534. The cubic root of 91542085 is about 450.6855148503.

The spelling of 91542085 in words is "ninety-one million, five hundred forty-two thousand, eighty-five".