2349936821 has 2 divisors, whose sum is σ = 2349936822. Its totient is φ = 2349936820.

The previous prime is 2349936793. The next prime is 2349936829. The reversal of 2349936821 is 1286399432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1969140625 + 380796196 = 44375^2 + 19514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2349936821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2349936829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1174968410 + 1174968411.

It is an arithmetic number, because the mean of its divisors is an integer number (1174968411).

Almost surely, 2^2349936821 is an apocalyptic number.

It is an amenable number.

2349936821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2349936821 is an equidigital number, since it uses as much as digits as its factorization.

2349936821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 2349936821 is about 48476.1469281543. The cubic root of 2349936821 is about 1329.4909807075.

The spelling of 2349936821 in words is "two billion, three hundred forty-nine million, nine hundred thirty-six thousand, eight hundred twenty-one".