90991094 has 8 divisors (see below), whose sum is σ = 138214560. Its totient is φ = 44919576.

The previous prime is 90991093. The next prime is 90991097. The reversal of 90991094 is 49019909.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90991093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287789 + ... + 288104.

It is an arithmetic number, because the mean of its divisors is an integer number (17276820).

Almost surely, 2^90991094 is an apocalyptic number.

90991094 is a deficient number, since it is larger than the sum of its proper divisors (47223466).

90991094 is a wasteful number, since it uses less digits than its factorization.

90991094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575974.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 90991094 is about 9538.9252015099. The cubic root of 90991094 is about 449.7794705446.

The spelling of 90991094 in words is "ninety million, nine hundred ninety-one thousand, ninety-four".