2927391 has 4 divisors (see below), whose sum is σ = 3903192. Its totient is φ = 1951592.

The previous prime is 2927389. The next prime is 2927459. The reversal of 2927391 is 1937292.

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

It is a cyclic number.

It is not a de Polignac number, because 2927391 - 2¹ = 2927389 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2927341) 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, 487896 + ... + 487901.

It is an arithmetic number, because the mean of its divisors is an integer number (975798).

2^2927391 is an apocalyptic number.

2927391 is a deficient number, since it is larger than the sum of its proper divisors (975801).

2927391 is an equidigital number, since it uses as much as digits as its factorization.

2927391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975800.

The product of its digits is 6804, while the sum is 33.

The square root of 2927391 is about 1710.9620100984. The cubic root of 2927391 is about 143.0518826524.

Subtracting from 2927391 its reverse (1937292), we obtain a palindrome (990099).

The spelling of 2927391 in words is "two million, nine hundred twenty-seven thousand, three hundred ninety-one".