82673621 has 4 divisors (see below), whose sum is σ = 85340544. Its totient is φ = 80006700.

The previous prime is 82673603. The next prime is 82673623. The reversal of 82673621 is 12637628.

It is a happy number.

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 82673621 - 2¹⁸ = 82411477 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 (82673623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333415 + ... + 1333476.

It is an arithmetic number, because the mean of its divisors is an integer number (21335136).

Almost surely, 2^82673621 is an apocalyptic number.

It is an amenable number.

82673621 is a deficient number, since it is larger than the sum of its proper divisors (2666923).

82673621 is a wasteful number, since it uses less digits than its factorization.

82673621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666922.

The product of its digits is 24192, while the sum is 35.

The square root of 82673621 is about 9092.5035606262. The cubic root of 82673621 is about 435.6345537064.

It can be divided in two parts, 826 and 73621, that added together give a palindrome (74447).

The spelling of 82673621 in words is "eighty-two million, six hundred seventy-three thousand, six hundred twenty-one".