4368693821 has 2 divisors, whose sum is σ = 4368693822. Its totient is φ = 4368693820.

The previous prime is 4368693799. The next prime is 4368693839. The reversal of 4368693821 is 1283968634.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4327797796 + 40896025 = 65786^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 4368693821 - 2¹⁴ = 4368677437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4368693821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4368693871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2184346910 + 2184346911.

It is an arithmetic number, because the mean of its divisors is an integer number (2184346911).

Almost surely, 2^4368693821 is an apocalyptic number.

It is an amenable number.

4368693821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4368693821 is an equidigital number, since it uses as much as digits as its factorization.

4368693821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 50.

The square root of 4368693821 is about 66096.0953536591. The cubic root of 4368693821 is about 1634.7469513330.

The spelling of 4368693821 in words is "four billion, three hundred sixty-eight million, six hundred ninety-three thousand, eight hundred twenty-one".