82969947 has 48 divisors (see below), whose sum is σ = 132808480. Its totient is φ = 51150528.

The previous prime is 82969921. The next prime is 82969949. The reversal of 82969947 is 74996928.

It is not a de Polignac number, because 82969947 - 2¹⁰ = 82968923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82969893 and 82969902.

It is not an unprimeable number, because it can be changed into a prime (82969949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 528393 + ... + 528549.

Almost surely, 2^82969947 is an apocalyptic number.

82969947 is a deficient number, since it is larger than the sum of its proper divisors (49838533).

82969947 is a wasteful number, since it uses less digits than its factorization.

82969947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 220 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 82969947 is about 9108.7840571615. The cubic root of 82969947 is about 436.1544128743.

The spelling of 82969947 in words is "eighty-two million, nine hundred sixty-nine thousand, nine hundred forty-seven".