82920797 has 4 divisors (see below), whose sum is σ = 83080476. Its totient is φ = 82761120.

The previous prime is 82920791. The next prime is 82920821. The reversal of 82920797 is 79702928.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27730756 + 55190041 = 5266^2 + 7429^2 .

It is a cyclic number.

It is not a de Polignac number, because 82920797 - 2¹⁶ = 82855261 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 (82920791) 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, 79058 + ... + 80099.

It is an arithmetic number, because the mean of its divisors is an integer number (20770119).

Almost surely, 2^82920797 is an apocalyptic number.

It is an amenable number.

82920797 is a deficient number, since it is larger than the sum of its proper divisors (159679).

82920797 is a wasteful number, since it uses less digits than its factorization.

82920797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159678.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 82920797 is about 9106.0857123135. The cubic root of 82920797 is about 436.0682723518.

The spelling of 82920797 in words is "eighty-two million, nine hundred twenty thousand, seven hundred ninety-seven".