82947405 has 8 divisors (see below), whose sum is σ = 132715872. Its totient is φ = 44238608.

The previous prime is 82947391. The next prime is 82947427. The reversal of 82947405 is 50474928.

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 82947405 - 2¹² = 82943309 is a prime.

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, 2764899 + ... + 2764928.

It is an arithmetic number, because the mean of its divisors is an integer number (16589484).

Almost surely, 2^82947405 is an apocalyptic number.

It is an amenable number.

82947405 is a deficient number, since it is larger than the sum of its proper divisors (49768467).

82947405 is a wasteful number, since it uses less digits than its factorization.

82947405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529835.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 82947405 is about 9107.5465960927. The cubic root of 82947405 is about 436.1149098829.

The spelling of 82947405 in words is "eighty-two million, nine hundred forty-seven thousand, four hundred five".