8489947 has 2 divisors, whose sum is σ = 8489948. Its totient is φ = 8489946.

The previous prime is 8489933. The next prime is 8489951. The reversal of 8489947 is 7499848.

8489947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8489947 - 2¹⁵ = 8457179 is a prime.

8489947 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8489947.

It is not a weakly prime, because it can be changed into another prime (8489917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4244973 + 4244974.

It is an arithmetic number, because the mean of its divisors is an integer number (4244974).

Almost surely, 2^8489947 is an apocalyptic number.

8489947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8489947 is an equidigital number, since it uses as much as digits as its factorization.

8489947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 8489947 is about 2913.7513620760. The cubic root of 8489947 is about 204.0022667312.

Subtracting from 8489947 its reverse (7499848), we obtain a palindrome (990099).

The spelling of 8489947 in words is "eight million, four hundred eighty-nine thousand, nine hundred forty-seven".