2791913621 has 12 divisors (see below), whose sum is σ = 3438780588. Its totient is φ = 2252299392.

The previous prime is 2791913611. The next prime is 2791913623. The reversal of 2791913621 is 1263191972.

It can be written as a sum of positive squares in 2 ways, for example, as 1708582225 + 1083331396 = 41335^2 + 32914^2 .

It is not a de Polignac number, because 2791913621 - 2¹⁰ = 2791912597 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 (2791913623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674986 + ... + 1676651.

It is an arithmetic number, because the mean of its divisors is an integer number (286565049).

Almost surely, 2^2791913621 is an apocalyptic number.

It is an amenable number.

2791913621 is a deficient number, since it is larger than the sum of its proper divisors (646866967).

2791913621 is a wasteful number, since it uses less digits than its factorization.

2791913621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351668 (or 3351661 counting only the distinct ones).

The product of its digits is 40824, while the sum is 41.

The square root of 2791913621 is about 52838.5618748277. The cubic root of 2791913621 is about 1408.1016017432.

The spelling of 2791913621 in words is "two billion, seven hundred ninety-one million, nine hundred thirteen thousand, six hundred twenty-one".