82735921 has 4 divisors (see below), whose sum is σ = 82872832. Its totient is φ = 82599012.

The previous prime is 82735903. The next prime is 82735949. The reversal of 82735921 is 12953728.

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 a de Polignac number, because none of the positive numbers 2^k-82735921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82735901) 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, 67545 + ... + 68758.

It is an arithmetic number, because the mean of its divisors is an integer number (20718208).

Almost surely, 2^82735921 is an apocalyptic number.

It is an amenable number.

82735921 is a deficient number, since it is larger than the sum of its proper divisors (136911).

82735921 is a wasteful number, since it uses less digits than its factorization.

82735921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136910.

The product of its digits is 30240, while the sum is 37.

The square root of 82735921 is about 9095.9288145851. The cubic root of 82735921 is about 435.7439526414.

The spelling of 82735921 in words is "eighty-two million, seven hundred thirty-five thousand, nine hundred twenty-one".