90006191 has 8 divisors (see below), whose sum is σ = 98758224. Its totient is φ = 81349120.

The previous prime is 90006179. The next prime is 90006209. The reversal of 90006191 is 19160009.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90006191 is a prime.

It is a super-2 number, since 2×90006191² = 16202228836656962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90006191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90006121) 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, 21746 + ... + 25551.

It is an arithmetic number, because the mean of its divisors is an integer number (12344778).

Almost surely, 2^90006191 is an apocalyptic number.

90006191 is a deficient number, since it is larger than the sum of its proper divisors (8752033).

90006191 is a wasteful number, since it uses less digits than its factorization.

90006191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47481.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 90006191 is about 9487.1592692439. The cubic root of 90006191 is about 448.1507501152.

The spelling of 90006191 in words is "ninety million, six thousand, one hundred ninety-one".