91690159 has 8 divisors (see below), whose sum is σ = 101913552. Its totient is φ = 81781440.

The previous prime is 91690153. The next prime is 91690187. The reversal of 91690159 is 95109619.

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 91690159 - 2¹⁷ = 91559087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91690153) 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, 78054 + ... + 79219.

It is an arithmetic number, because the mean of its divisors is an integer number (12739194).

Almost surely, 2^91690159 is an apocalyptic number.

91690159 is a deficient number, since it is larger than the sum of its proper divisors (10223393).

91690159 is a wasteful number, since it uses less digits than its factorization.

91690159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157337.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 91690159 is about 9575.4978460652. The cubic root of 91690159 is about 450.9283862280.

The spelling of 91690159 in words is "ninety-one million, six hundred ninety thousand, one hundred fifty-nine".