91155059 has 4 divisors (see below), whose sum is σ = 92700120. Its totient is φ = 89610000.

The previous prime is 91155017. The next prime is 91155067. The reversal of 91155059 is 95055119.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95055119 = 19 ⋅5002901.

It is a cyclic number.

It is not a de Polignac number, because 91155059 - 2¹² = 91150963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91155079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772442 + ... + 772559.

It is an arithmetic number, because the mean of its divisors is an integer number (23175030).

Almost surely, 2^91155059 is an apocalyptic number.

91155059 is a deficient number, since it is larger than the sum of its proper divisors (1545061).

91155059 is a wasteful number, since it uses less digits than its factorization.

91155059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545060.

The product of its (nonzero) digits is 10125, while the sum is 35.

The square root of 91155059 is about 9547.5158549227. The cubic root of 91155059 is about 450.0494743958.

The spelling of 91155059 in words is "ninety-one million, one hundred fifty-five thousand, fifty-nine".