8420647013 has 4 divisors (see below), whose sum is σ = 8423166240. Its totient is φ = 8418127788.

The previous prime is 8420647007. The next prime is 8420647021. The reversal of 8420647013 is 3107460248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8420647013 - 2¹² = 8420642917 is a prime.

It is a super-2 number, since 2×8420647013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420647003) 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, 1254593 + ... + 1261286.

It is an arithmetic number, because the mean of its divisors is an integer number (2105791560).

Almost surely, 2^8420647013 is an apocalyptic number.

It is an amenable number.

8420647013 is a deficient number, since it is larger than the sum of its proper divisors (2519227).

8420647013 is a wasteful number, since it uses less digits than its factorization.

8420647013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519226.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 8420647013 is about 91764.0834586169. The cubic root of 8420647013 is about 2034.4568706320.

The spelling of 8420647013 in words is "eight billion, four hundred twenty million, six hundred forty-seven thousand, thirteen".