82651789 has 4 divisors (see below), whose sum is σ = 90165600. Its totient is φ = 75137980.

The previous prime is 82651787. The next prime is 82651823. The reversal of 82651789 is 98715628.

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 82651789 - 2¹ = 82651787 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 (82651781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3756889 + ... + 3756910.

It is an arithmetic number, because the mean of its divisors is an integer number (22541400).

Almost surely, 2^82651789 is an apocalyptic number.

It is an amenable number.

82651789 is a deficient number, since it is larger than the sum of its proper divisors (7513811).

82651789 is a wasteful number, since it uses less digits than its factorization.

82651789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513810.

The product of its digits is 241920, while the sum is 46.

The square root of 82651789 is about 9091.3029319235. The cubic root of 82651789 is about 435.5962036629.

The spelling of 82651789 in words is "eighty-two million, six hundred fifty-one thousand, seven hundred eighty-nine".