89785915 has 4 divisors (see below), whose sum is σ = 107743104. Its totient is φ = 71828728.

The previous prime is 89785909. The next prime is 89785919. The reversal of 89785915 is 51958798.

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 89785915 - 2⁹ = 89785403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89785919) 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, 8978587 + ... + 8978596.

It is an arithmetic number, because the mean of its divisors is an integer number (26935776).

Almost surely, 2^89785915 is an apocalyptic number.

89785915 is a deficient number, since it is larger than the sum of its proper divisors (17957189).

89785915 is a wasteful number, since it uses less digits than its factorization.

89785915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17957188.

The product of its digits is 907200, while the sum is 52.

The square root of 89785915 is about 9475.5429923567. The cubic root of 89785915 is about 447.7848586340.

The spelling of 89785915 in words is "eighty-nine million, seven hundred eighty-five thousand, nine hundred fifteen".