4761579821 has 2 divisors, whose sum is σ = 4761579822. Its totient is φ = 4761579820.

The previous prime is 4761579811. The next prime is 4761579841. The reversal of 4761579821 is 1289751674.

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., 2614276900 + 2147302921 = 51130^2 + 46339^2 .

It is a cyclic number.

It is not a de Polignac number, because 4761579821 - 2¹⁰ = 4761578797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4761579821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4761579811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2380789910 + 2380789911.

It is an arithmetic number, because the mean of its divisors is an integer number (2380789911).

Almost surely, 2^4761579821 is an apocalyptic number.

It is an amenable number.

4761579821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4761579821 is an equidigital number, since it uses as much as digits as its factorization.

4761579821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The square root of 4761579821 is about 69004.2014735335. The cubic root of 4761579821 is about 1682.3525974368.

The spelling of 4761579821 in words is "four billion, seven hundred sixty-one million, five hundred seventy-nine thousand, eight hundred twenty-one".