47982091 has 4 divisors (see below), whose sum is σ = 48127384. Its totient is φ = 47836800.

The previous prime is 47982089. The next prime is 47982149. The reversal of 47982091 is 19028974.

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 47982091 - 2¹ = 47982089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47982001) 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, 72150 + ... + 72811.

It is an arithmetic number, because the mean of its divisors is an integer number (12031846).

Almost surely, 2^47982091 is an apocalyptic number.

47982091 is a deficient number, since it is larger than the sum of its proper divisors (145293).

47982091 is a wasteful number, since it uses less digits than its factorization.

47982091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145292.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 47982091 is about 6926.9106389501. The cubic root of 47982091 is about 363.3789145931.

It can be divided in two parts, 4798 and 2091, that added together give a square (6889 = 83²).

The spelling of 47982091 in words is "forty-seven million, nine hundred eighty-two thousand, ninety-one".