82874989 has 4 divisors (see below), whose sum is σ = 83635420. Its totient is φ = 82114560.

The previous prime is 82874977. The next prime is 82875019. The reversal of 82874989 is 98947828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24581764 + 58293225 = 4958^2 + 7635^2 .

It is a cyclic number.

It is not a de Polignac number, because 82874989 - 2¹¹ = 82872941 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 (82878989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380052 + ... + 380269.

It is an arithmetic number, because the mean of its divisors is an integer number (20908855).

Almost surely, 2^82874989 is an apocalyptic number.

It is an amenable number.

82874989 is a deficient number, since it is larger than the sum of its proper divisors (760431).

82874989 is a wasteful number, since it uses less digits than its factorization.

82874989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760430.

The product of its digits is 2322432, while the sum is 55.

The square root of 82874989 is about 9103.5701238580. The cubic root of 82874989 is about 435.9879583830.

The spelling of 82874989 in words is "eighty-two million, eight hundred seventy-four thousand, nine hundred eighty-nine".