82877947 has 4 divisors (see below), whose sum is σ = 86481360. Its totient is φ = 79274536.

The previous prime is 82877903. The next prime is 82877987. The reversal of 82877947 is 74977828.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82877947 - 2⁷ = 82877819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82877894 and 82877903.

It is not an unprimeable number, because it can be changed into a prime (82877987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801672 + ... + 1801717.

It is an arithmetic number, because the mean of its divisors is an integer number (21620340).

Almost surely, 2^82877947 is an apocalyptic number.

82877947 is a deficient number, since it is larger than the sum of its proper divisors (3603413).

82877947 is a wasteful number, since it uses less digits than its factorization.

82877947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603412.

The product of its digits is 1580544, while the sum is 52.

The square root of 82877947 is about 9103.7325861429. The cubic root of 82877947 is about 435.9931454608.

The spelling of 82877947 in words is "eighty-two million, eight hundred seventy-seven thousand, nine hundred forty-seven".