82013889 has 8 divisors (see below), whose sum is σ = 110355520. Its totient is φ = 54174096.

The previous prime is 82013887. The next prime is 82013917. The reversal of 82013889 is 98831028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82013889 - 2¹ = 82013887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82013887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125077 + ... + 125730.

It is an arithmetic number, because the mean of its divisors is an integer number (13794440).

Almost surely, 2^82013889 is an apocalyptic number.

It is an amenable number.

82013889 is a deficient number, since it is larger than the sum of its proper divisors (28341631).

82013889 is a wasteful number, since it uses less digits than its factorization.

82013889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250919.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 82013889 is about 9056.1519973993. The cubic root of 82013889 is about 434.4726758520.

It can be divided in two parts, 8201 and 3889, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 82013889 in words is "eighty-two million, thirteen thousand, eight hundred eighty-nine".