2945391 has 4 divisors (see below), whose sum is σ = 3927192. Its totient is φ = 1963592.

The previous prime is 2945381. The next prime is 2945401. The reversal of 2945391 is 1935492.

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

It is an interprime number because it is at equal distance from previous prime (2945381) and next prime (2945401).

It is a cyclic number.

It is not a de Polignac number, because 2945391 - 2⁵ = 2945359 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 (2945321) 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, 490896 + ... + 490901.

It is an arithmetic number, because the mean of its divisors is an integer number (981798).

2^2945391 is an apocalyptic number.

2945391 is a deficient number, since it is larger than the sum of its proper divisors (981801).

2945391 is an equidigital number, since it uses as much as digits as its factorization.

2945391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981800.

The product of its digits is 9720, while the sum is 33.

The square root of 2945391 is about 1716.2141474769. The cubic root of 2945391 is about 143.3444838390.

The spelling of 2945391 in words is "two million, nine hundred forty-five thousand, three hundred ninety-one".