2791387 has 2 divisors, whose sum is σ = 2791388. Its totient is φ = 2791386.

The previous prime is 2791379. The next prime is 2791409. The reversal of 2791387 is 7831972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2791387 - 2³ = 2791379 is a prime.

2791387 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2791357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395693 + 1395694.

It is an arithmetic number, because the mean of its divisors is an integer number (1395694).

2^2791387 is an apocalyptic number.

2791387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2791387 is an equidigital number, since it uses as much as digits as its factorization.

2791387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2791387 is about 1670.7444448509. The cubic root of 2791387 is about 140.8013062411.

The spelling of 2791387 in words is "two million, seven hundred ninety-one thousand, three hundred eighty-seven".