2791615397 has 4 divisors (see below), whose sum is σ = 2791871820. Its totient is φ = 2791358976.

The previous prime is 2791615357. The next prime is 2791615403. The reversal of 2791615397 is 7935161972.

2791615397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2593763041 + 197852356 = 50929^2 + 14066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2791615397 - 2¹⁶ = 2791549861 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 (2791615327) 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, 111122 + ... + 133907.

It is an arithmetic number, because the mean of its divisors is an integer number (697967955).

Almost surely, 2^2791615397 is an apocalyptic number.

It is an amenable number.

2791615397 is a deficient number, since it is larger than the sum of its proper divisors (256423).

2791615397 is a wasteful number, since it uses less digits than its factorization.

2791615397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256422.

The product of its digits is 714420, while the sum is 50.

The square root of 2791615397 is about 52835.7397695916. The cubic root of 2791615397 is about 1408.0514635344.

The spelling of 2791615397 in words is "two billion, seven hundred ninety-one million, six hundred fifteen thousand, three hundred ninety-seven".