91025799 has 4 divisors (see below), whose sum is σ = 121367736. Its totient is φ = 60683864.

The previous prime is 91025777. The next prime is 91025819. The reversal of 91025799 is 99752019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91025799 - 2¹² = 91021703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91025799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91025719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15170964 + ... + 15170969.

It is an arithmetic number, because the mean of its divisors is an integer number (30341934).

Almost surely, 2^91025799 is an apocalyptic number.

91025799 is a deficient number, since it is larger than the sum of its proper divisors (30341937).

91025799 is a wasteful number, since it uses less digits than its factorization.

91025799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30341936.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 91025799 is about 9540.7441533667. The cubic root of 91025799 is about 449.8366468817.

The spelling of 91025799 in words is "ninety-one million, twenty-five thousand, seven hundred ninety-nine".