91022495 has 4 divisors (see below), whose sum is σ = 109227000. Its totient is φ = 72817992.

The previous prime is 91022473. The next prime is 91022507. The reversal of 91022495 is 59422019.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91022495 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9102245 + ... + 9102254.

It is an arithmetic number, because the mean of its divisors is an integer number (27306750).

Almost surely, 2^91022495 is an apocalyptic number.

91022495 is a deficient number, since it is larger than the sum of its proper divisors (18204505).

91022495 is a wasteful number, since it uses less digits than its factorization.

91022495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18204504.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 91022495 is about 9540.5709996834. The cubic root of 91022495 is about 449.8312041820.

The spelling of 91022495 in words is "ninety-one million, twenty-two thousand, four hundred ninety-five".