82820653 has 4 divisors (see below), whose sum is σ = 82843488. Its totient is φ = 82797820.

The previous prime is 82820629. The next prime is 82820657. The reversal of 82820653 is 35602828.

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-82820653 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 (82820657) 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, 4633 + ... + 13678.

It is an arithmetic number, because the mean of its divisors is an integer number (20710872).

Almost surely, 2^82820653 is an apocalyptic number.

It is an amenable number.

82820653 is a deficient number, since it is larger than the sum of its proper divisors (22835).

82820653 is a wasteful number, since it uses less digits than its factorization.

82820653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22834.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 82820653 is about 9100.5853108468. The cubic root of 82820653 is about 435.8926541133.

The spelling of 82820653 in words is "eighty-two million, eight hundred twenty thousand, six hundred fifty-three".