8102947 has 4 divisors (see below), whose sum is σ = 8113240. Its totient is φ = 8092656.

The previous prime is 8102933. The next prime is 8102959. The reversal of 8102947 is 7492018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8102947 is a prime.

It is a Duffinian number.

8102947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8102747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3858 + ... + 5575.

It is an arithmetic number, because the mean of its divisors is an integer number (2028310).

Almost surely, 2^8102947 is an apocalyptic number.

8102947 is a deficient number, since it is larger than the sum of its proper divisors (10293).

8102947 is an equidigital number, since it uses as much as digits as its factorization.

8102947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8102947 is about 2846.5675821944. The cubic root of 8102947 is about 200.8542378604.

The spelling of 8102947 in words is "eight million, one hundred two thousand, nine hundred forty-seven".