91673869 has 4 divisors (see below), whose sum is σ = 104770144. Its totient is φ = 78577596.

The previous prime is 91673867. The next prime is 91673873. The reversal of 91673869 is 96837619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91673869 - 2¹ = 91673867 is a prime.

It is a super-2 number, since 2×91673869² = 16808196514858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91673863) 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, 6548127 + ... + 6548140.

It is an arithmetic number, because the mean of its divisors is an integer number (26192536).

Almost surely, 2^91673869 is an apocalyptic number.

It is an amenable number.

91673869 is a deficient number, since it is larger than the sum of its proper divisors (13096275).

91673869 is a wasteful number, since it uses less digits than its factorization.

91673869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096274.

The product of its digits is 489888, while the sum is 49.

The square root of 91673869 is about 9574.6471997667. The cubic root of 91673869 is about 450.9016801323.

The spelling of 91673869 in words is "ninety-one million, six hundred seventy-three thousand, eight hundred sixty-nine".