91715020 has 12 divisors (see below), whose sum is σ = 192601584. Its totient is φ = 36686000.

The previous prime is 91715009. The next prime is 91715021. The reversal of 91715020 is 2051719.

It is not an unprimeable number, because it can be changed into a prime (91715021) 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, 2292856 + ... + 2292895.

It is an arithmetic number, because the mean of its divisors is an integer number (16050132).

Almost surely, 2^91715020 is an apocalyptic number.

It is an amenable number.

91715020 is an abundant number, since it is smaller than the sum of its proper divisors (100886564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91715020 is a wasteful number, since it uses less digits than its factorization.

91715020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585760 (or 4585758 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 91715020 is about 9576.7959151274. The cubic root of 91715020 is about 450.9691376662.

Adding to 91715020 its reverse (2051719), we get a palindrome (93766739).

The spelling of 91715020 in words is "ninety-one million, seven hundred fifteen thousand, twenty".