91836869 has 8 divisors (see below), whose sum is σ = 92699640. Its totient is φ = 90978496.

The previous prime is 91836859. The next prime is 91836887. The reversal of 91836869 is 96863819.

It can be written as a sum of positive squares in 4 ways, for example, as 15484225 + 76352644 = 3935^2 + 8738^2 .

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 91836869 - 2¹² = 91832773 is a prime.

It is a super-2 number, since 2×91836869² = 16868021015446322, 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 (91836859) 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, 52127 + ... + 53859.

It is an arithmetic number, because the mean of its divisors is an integer number (11587455).

Almost surely, 2^91836869 is an apocalyptic number.

It is an amenable number.

91836869 is a deficient number, since it is larger than the sum of its proper divisors (862771).

91836869 is a wasteful number, since it uses less digits than its factorization.

91836869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199.

The product of its digits is 559872, while the sum is 50.

The square root of 91836869 is about 9583.1554824077. The cubic root of 91836869 is about 451.1687626259.

The spelling of 91836869 in words is "ninety-one million, eight hundred thirty-six thousand, eight hundred sixty-nine".