82347947 has 8 divisors (see below), whose sum is σ = 90039600. Its totient is φ = 74690560.

The previous prime is 82347917. The next prime is 82347971. The reversal of 82347947 is 74974328.

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-82347947 is a prime.

It is a super-2 number, since 2×82347947² = 13562368750229618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82347898 and 82347907.

It is not an unprimeable number, because it can be changed into a prime (82347917) 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, 3398 + ... + 13275.

It is an arithmetic number, because the mean of its divisors is an integer number (11254950).

Almost surely, 2^82347947 is an apocalyptic number.

82347947 is a deficient number, since it is larger than the sum of its proper divisors (7691653).

82347947 is a wasteful number, since it uses less digits than its factorization.

82347947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133.

The product of its digits is 338688, while the sum is 44.

The square root of 82347947 is about 9074.5769598368. The cubic root of 82347947 is about 435.0617730568.

The spelling of 82347947 in words is "eighty-two million, three hundred forty-seven thousand, nine hundred forty-seven".