82977805 has 4 divisors (see below), whose sum is σ = 99573372. Its totient is φ = 66382240.

The previous prime is 82977803. The next prime is 82977827. The reversal of 82977805 is 50877928.

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 50282281 + 32695524 = 7091^2 + 5718^2 .

It is not a de Polignac number, because 82977805 - 2¹ = 82977803 is a prime.

It is a super-2 number, since 2×82977805² = 13770632245236050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82977803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8297776 + ... + 8297785.

It is an arithmetic number, because the mean of its divisors is an integer number (24893343).

Almost surely, 2^82977805 is an apocalyptic number.

It is an amenable number.

82977805 is a deficient number, since it is larger than the sum of its proper divisors (16595567).

82977805 is a wasteful number, since it uses less digits than its factorization.

82977805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16595566.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 82977805 is about 9109.2153888247. The cubic root of 82977805 is about 436.1681816878.

The spelling of 82977805 in words is "eighty-two million, nine hundred seventy-seven thousand, eight hundred five".