91541057 has 4 divisors (see below), whose sum is σ = 91560240. Its totient is φ = 91521876.

The previous prime is 91541011. The next prime is 91541083. The reversal of 91541057 is 75014519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91541057 - 2¹⁴ = 91524673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91541257) 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 3 ways as a sum of consecutive naturals, for example, 3794 + ... + 14052.

It is an arithmetic number, because the mean of its divisors is an integer number (22890060).

Almost surely, 2^91541057 is an apocalyptic number.

It is an amenable number.

91541057 is a deficient number, since it is larger than the sum of its proper divisors (19183).

91541057 is a wasteful number, since it uses less digits than its factorization.

91541057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19182.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 91541057 is about 9567.7090779350. The cubic root of 91541057 is about 450.6838278067.

The spelling of 91541057 in words is "ninety-one million, five hundred forty-one thousand, fifty-seven".