91245655 has 4 divisors (see below), whose sum is σ = 109494792. Its totient is φ = 72996520.

The previous prime is 91245653. The next prime is 91245667. The reversal of 91245655 is 55654219.

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

It is not a de Polignac number, because 91245655 - 2¹ = 91245653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91245653) 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, 9124561 + ... + 9124570.

It is an arithmetic number, because the mean of its divisors is an integer number (27373698).

Almost surely, 2^91245655 is an apocalyptic number.

91245655 is a deficient number, since it is larger than the sum of its proper divisors (18249137).

91245655 is a wasteful number, since it uses less digits than its factorization.

91245655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18249136.

The product of its digits is 54000, while the sum is 37.

The square root of 91245655 is about 9552.2591568696. The cubic root of 91245655 is about 450.1985214611.

The spelling of 91245655 in words is "ninety-one million, two hundred forty-five thousand, six hundred fifty-five".