90917995 has 32 divisors (see below), whose sum is σ = 127922688. Its totient is φ = 60749568.

The previous prime is 90917993. The next prime is 90918013. The reversal of 90917995 is 59971909.

It is a cyclic number.

It is not a de Polignac number, because 90917995 - 2¹ = 90917993 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90917993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321124 + ... + 321406.

It is an arithmetic number, because the mean of its divisors is an integer number (3997584).

It is a vampire number, since it can be written as 9179 ⋅ 9905 (with its own digits).

Almost surely, 2^90917995 is an apocalyptic number.

90917995 is a deficient number, since it is larger than the sum of its proper divisors (37004693).

90917995 is a wasteful number, since it uses less digits than its factorization.

90917995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 90917995 is about 9535.0928154895. The cubic root of 90917995 is about 449.6589926808.

The spelling of 90917995 in words is "ninety million, nine hundred seventeen thousand, nine hundred ninety-five".