3099944821 has 4 divisors (see below), whose sum is σ = 3206839500. Its totient is φ = 2993050144.

The previous prime is 3099944819. The next prime is 3099944843. The reversal of 3099944821 is 1284499903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1863648900 + 1236295921 = 43170^2 + 35161^2 .

It is a cyclic number.

It is not a de Polignac number, because 3099944821 - 2¹ = 3099944819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3099944021) 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, 53447296 + ... + 53447353.

It is an arithmetic number, because the mean of its divisors is an integer number (801709875).

Almost surely, 2^3099944821 is an apocalyptic number.

It is an amenable number.

3099944821 is a deficient number, since it is larger than the sum of its proper divisors (106894679).

3099944821 is a wasteful number, since it uses less digits than its factorization.

3099944821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106894678.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 3099944821 is about 55677.1481040471. The cubic root of 3099944821 is about 1458.0910845404.

The spelling of 3099944821 in words is "three billion, ninety-nine million, nine hundred forty-four thousand, eight hundred twenty-one".