8720147 has 4 divisors (see below), whose sum is σ = 8729496. Its totient is φ = 8710800.

The previous prime is 8720137. The next prime is 8720161. The reversal of 8720147 is 7410278.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8720147 - 2¹⁸ = 8458003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720137) 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, 3098 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (2182374).

Almost surely, 2^8720147 is an apocalyptic number.

8720147 is a deficient number, since it is larger than the sum of its proper divisors (9349).

8720147 is a wasteful number, since it uses less digits than its factorization.

8720147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 8720147 is about 2952.9895021825. The cubic root of 8720147 is about 205.8296499129.

The spelling of 8720147 in words is "eight million, seven hundred twenty thousand, one hundred forty-seven".