91948447 has 4 divisors (see below), whose sum is σ = 91967656. Its totient is φ = 91929240.

The previous prime is 91948421. The next prime is 91948453. The reversal of 91948447 is 74484919.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91948447 - 2¹¹ = 91946399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91948397 and 91948406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91948477) 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, 3997 + ... + 14137.

It is an arithmetic number, because the mean of its divisors is an integer number (22991914).

Almost surely, 2^91948447 is an apocalyptic number.

91948447 is a deficient number, since it is larger than the sum of its proper divisors (19209).

91948447 is a wasteful number, since it uses less digits than its factorization.

91948447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19208.

The product of its digits is 290304, while the sum is 46.

The square root of 91948447 is about 9588.9752841479. The cubic root of 91948447 is about 451.3514058108.

The spelling of 91948447 in words is "ninety-one million, nine hundred forty-eight thousand, four hundred forty-seven".