90910101 has 8 divisors (see below), whose sum is σ = 128343744. Its totient is φ = 57041600.

The previous prime is 90910097. The next prime is 90910111. The reversal of 90910101 is 10101909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90910101 - 2² = 90910097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90910111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891225 + ... + 891326.

It is an arithmetic number, because the mean of its divisors is an integer number (16042968).

Almost surely, 2^90910101 is an apocalyptic number.

It is an amenable number.

90910101 is a deficient number, since it is larger than the sum of its proper divisors (37433643).

90910101 is a wasteful number, since it uses less digits than its factorization.

90910101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782571.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 90910101 is about 9534.6788619229. The cubic root of 90910101 is about 449.6459783491.

The spelling of 90910101 in words is "ninety million, nine hundred ten thousand, one hundred one".