82920077 has 6 divisors (see below), whose sum is σ = 85878858. Its totient is φ = 80059952.

The previous prime is 82920041. The next prime is 82920107. The reversal of 82920077 is 77002928.

It can be written as a sum of positive squares in 3 ways, for example, as 43217476 + 39702601 = 6574^2 + 6301^2 .

It is not a de Polignac number, because 82920077 - 2²⁰ = 81871501 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 (82920007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48458 + ... + 50139.

It is an arithmetic number, because the mean of its divisors is an integer number (14313143).

Almost surely, 2^82920077 is an apocalyptic number.

It is an amenable number.

82920077 is a deficient number, since it is larger than the sum of its proper divisors (2958781).

82920077 is an equidigital number, since it uses as much as digits as its factorization.

82920077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98655 (or 98626 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 82920077 is about 9106.0461782269. The cubic root of 82920077 is about 436.0670102234.

The spelling of 82920077 in words is "eighty-two million, nine hundred twenty thousand, seventy-seven".