82947845 has 8 divisors (see below), whose sum is σ = 105392664. Its totient is φ = 62454784.

The previous prime is 82947829. The next prime is 82947881. The reversal of 82947845 is 54874928.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3541924 + 79405921 = 1882^2 + 8911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82947845 - 2⁴ = 82947829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82947845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487844 + ... + 488013.

It is an arithmetic number, because the mean of its divisors is an integer number (13174083).

Almost surely, 2^82947845 is an apocalyptic number.

82947845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

82947845 is a deficient number, since it is larger than the sum of its proper divisors (22444819).

82947845 is a wasteful number, since it uses less digits than its factorization.

82947845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975879.

The product of its digits is 645120, while the sum is 47.

The square root of 82947845 is about 9107.5707518525. The cubic root of 82947845 is about 436.1156810150.

The spelling of 82947845 in words is "eighty-two million, nine hundred forty-seven thousand, eight hundred forty-five".