82840637 has 4 divisors (see below), whose sum is σ = 90371616. Its totient is φ = 75309660.

The previous prime is 82840631. The next prime is 82840673. The reversal of 82840637 is 73604828.

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 82840637 - 2⁴ = 82840621 is a prime.

It is a super-2 number, since 2×82840637² = 13725142277131538, which contains 22 as substring.

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 82840637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82840631) 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, 3765473 + ... + 3765494.

It is an arithmetic number, because the mean of its divisors is an integer number (22592904).

Almost surely, 2^82840637 is an apocalyptic number.

It is an amenable number.

82840637 is a deficient number, since it is larger than the sum of its proper divisors (7530979).

82840637 is a wasteful number, since it uses less digits than its factorization.

82840637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530978.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 82840637 is about 9101.6831959808. The cubic root of 82840637 is about 435.9277104990.

The spelling of 82840637 in words is "eighty-two million, eight hundred forty thousand, six hundred thirty-seven".