91880006 has 8 divisors (see below), whose sum is σ = 137861184. Its totient is φ = 45926280.

The previous prime is 91879999. The next prime is 91880021. The reversal of 91880006 is 60008819.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7616 + ... + 15548.

It is an arithmetic number, because the mean of its divisors is an integer number (17232648).

Almost surely, 2^91880006 is an apocalyptic number.

91880006 is a deficient number, since it is larger than the sum of its proper divisors (45981178).

91880006 is a wasteful number, since it uses less digits than its factorization.

91880006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13726.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 91880006 is about 9585.4058860332. The cubic root of 91880006 is about 451.2393915601.

The spelling of 91880006 in words is "ninety-one million, eight hundred eighty thousand, six".