82951789 has 4 divisors (see below), whose sum is σ = 87831324. Its totient is φ = 78072256.

The previous prime is 82951787. The next prime is 82951793. The reversal of 82951789 is 98715928.

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 50836900 + 32114889 = 7130^2 + 5667^2 .

It is a cyclic number.

It is not a de Polignac number, because 82951789 - 2¹ = 82951787 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82951787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2439742 + ... + 2439775.

It is an arithmetic number, because the mean of its divisors is an integer number (21957831).

Almost surely, 2^82951789 is an apocalyptic number.

It is an amenable number.

82951789 is a deficient number, since it is larger than the sum of its proper divisors (4879535).

82951789 is a wasteful number, since it uses less digits than its factorization.

82951789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879534.

The product of its digits is 362880, while the sum is 49.

The square root of 82951789 is about 9107.7872724389. The cubic root of 82951789 is about 436.1225930410.

The spelling of 82951789 in words is "eighty-two million, nine hundred fifty-one thousand, seven hundred eighty-nine".