4891447 has 4 divisors (see below), whose sum is σ = 5336136. Its totient is φ = 4446760.

The previous prime is 4891429. The next prime is 4891457. The reversal of 4891447 is 7441984.

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 4891447 - 2¹¹ = 4889399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891457) 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, 222328 + ... + 222349.

It is an arithmetic number, because the mean of its divisors is an integer number (1334034).

Almost surely, 2^4891447 is an apocalyptic number.

4891447 is a deficient number, since it is larger than the sum of its proper divisors (444689).

4891447 is a wasteful number, since it uses less digits than its factorization.

4891447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444688.

The product of its digits is 32256, while the sum is 37.

The square root of 4891447 is about 2211.6615925589. The cubic root of 4891447 is about 169.7510427425.

It can be divided in two parts, 489 and 1447, that added together give a square (1936 = 44²).

The spelling of 4891447 in words is "four million, eight hundred ninety-one thousand, four hundred forty-seven".