4945679569 has 2 divisors, whose sum is σ = 4945679570. Its totient is φ = 4945679568.

The previous prime is 4945679567. The next prime is 4945679573. The reversal of 4945679569 is 9659765494.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4731788944 + 213890625 = 68788^2 + 14625^2 .

It is a cyclic number.

It is not a de Polignac number, because 4945679569 - 2¹ = 4945679567 is a prime.

It is a super-2 number, since 2×4945679569² = 48919492798448051522, which contains 22 as substring.

Together with 4945679567, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4945679569.

It is not a weakly prime, because it can be changed into another prime (4945679567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472839784 + 2472839785.

It is an arithmetic number, because the mean of its divisors is an integer number (2472839785).

Almost surely, 2^4945679569 is an apocalyptic number.

It is an amenable number.

4945679569 is a deficient number, since it is larger than the sum of its proper divisors (1).

4945679569 is an equidigital number, since it uses as much as digits as its factorization.

4945679569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73483200, while the sum is 64.

The square root of 4945679569 is about 70325.5257285717. The cubic root of 4945679569 is about 1703.7609432368.

The spelling of 4945679569 in words is "four billion, nine hundred forty-five million, six hundred seventy-nine thousand, five hundred sixty-nine".