100090091 has 8 divisors (see below), whose sum is σ = 101354544. Its totient is φ = 98831200.

The previous prime is 100090087. The next prime is 100090099. The reversal of 100090091 is 190090001.

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 100090091 - 2² = 100090087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100090099) 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, 43625 + ... + 45861.

It is an arithmetic number, because the mean of its divisors is an integer number (12669318).

Almost surely, 2^100090091 is an apocalyptic number.

100090091 is a deficient number, since it is larger than the sum of its proper divisors (1264453).

100090091 is a wasteful number, since it uses less digits than its factorization.

100090091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 100090091 is about 10004.5035359082. The cubic root of 100090091 is about 464.2982299833.

The spelling of 100090091 in words is "one hundred million, ninety thousand, ninety-one".