2791397 has 4 divisors (see below), whose sum is σ = 3190176. Its totient is φ = 2392620.

The previous prime is 2791387. The next prime is 2791409. The reversal of 2791397 is 7931972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2791397 - 2⁸ = 2791141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2791397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199379 + ... + 199392.

It is an arithmetic number, because the mean of its divisors is an integer number (797544).

2^2791397 is an apocalyptic number.

It is an amenable number.

2791397 is a deficient number, since it is larger than the sum of its proper divisors (398779).

2791397 is an equidigital number, since it uses as much as digits as its factorization.

2791397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398778.

The product of its digits is 23814, while the sum is 38.

The square root of 2791397 is about 1670.7474375261. The cubic root of 2791397 is about 140.8014743787.

The spelling of 2791397 in words is "two million, seven hundred ninety-one thousand, three hundred ninety-seven".