84727889 has 4 divisors (see below), whose sum is σ = 85247856. Its totient is φ = 84207924.

The previous prime is 84727873. The next prime is 84727913. The reversal of 84727889 is 98872748.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84727889 - 2⁴ = 84727873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84727889.

It is not an unprimeable number, because it can be changed into a prime (84727829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259739 + ... + 260064.

It is an arithmetic number, because the mean of its divisors is an integer number (21311964).

Almost surely, 2^84727889 is an apocalyptic number.

It is an amenable number.

84727889 is a deficient number, since it is larger than the sum of its proper divisors (519967).

84727889 is a wasteful number, since it uses less digits than its factorization.

84727889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519966.

The product of its digits is 1806336, while the sum is 53.

The square root of 84727889 is about 9204.7753367478. The cubic root of 84727889 is about 439.2132790971.

It can be divided in two parts, 8472 and 7889, that added together give a palindrome (16361).

The spelling of 84727889 in words is "eighty-four million, seven hundred twenty-seven thousand, eight hundred eighty-nine".