82997447 has 8 divisors (see below), whose sum is σ = 92265600. Its totient is φ = 74141280.

The previous prime is 82997437. The next prime is 82997471. The reversal of 82997447 is 74479928.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82997447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82997395 and 82997404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82997437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102572 + ... + 103377.

It is an arithmetic number, because the mean of its divisors is an integer number (11533200).

Almost surely, 2^82997447 is an apocalyptic number.

82997447 is a deficient number, since it is larger than the sum of its proper divisors (9268153).

82997447 is a wasteful number, since it uses less digits than its factorization.

82997447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205993.

The product of its digits is 1016064, while the sum is 50.

The square root of 82997447 is about 9110.2934639890. The cubic root of 82997447 is about 436.2025946633.

The spelling of 82997447 in words is "eighty-two million, nine hundred ninety-seven thousand, four hundred forty-seven".