91672849 has 4 divisors (see below), whose sum is σ = 91692580. Its totient is φ = 91653120.

The previous prime is 91672837. The next prime is 91672901. The reversal of 91672849 is 94827619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94827619 = 467 ⋅203057.

It can be written as a sum of positive squares in 2 ways, for example, as 34398225 + 57274624 = 5865^2 + 7568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91672849 is a prime.

It is a super-2 number, since 2×91672849² = 16807822487553602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91672799 and 91672808.

It is not an unprimeable number, because it can be changed into a prime (91678849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369 + ... + 13609.

It is an arithmetic number, because the mean of its divisors is an integer number (22923145).

Almost surely, 2^91672849 is an apocalyptic number.

It is an amenable number.

91672849 is a deficient number, since it is larger than the sum of its proper divisors (19731).

91672849 is a wasteful number, since it uses less digits than its factorization.

91672849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19730.

The product of its digits is 217728, while the sum is 46.

The square root of 91672849 is about 9574.5939339483. The cubic root of 91672849 is about 450.9000078222.

The spelling of 91672849 in words is "ninety-one million, six hundred seventy-two thousand, eight hundred forty-nine".