2397894391 has 4 divisors (see below), whose sum is σ = 2398019800. Its totient is φ = 2397768984.

The previous prime is 2397894341. The next prime is 2397894397. The reversal of 2397894391 is 1934987932.

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 2397894391 - 2⁷ = 2397894263 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 (2397894397) 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, 27396 + ... + 74473.

It is an arithmetic number, because the mean of its divisors is an integer number (599504950).

Almost surely, 2^2397894391 is an apocalyptic number.

2397894391 is a deficient number, since it is larger than the sum of its proper divisors (125409).

2397894391 is a wasteful number, since it uses less digits than its factorization.

2397894391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125408.

The product of its digits is 2939328, while the sum is 55.

The square root of 2397894391 is about 48968.2998581736. The cubic root of 2397894391 is about 1338.4742400347.

The spelling of 2397894391 in words is "two billion, three hundred ninety-seven million, eight hundred ninety-four thousand, three hundred ninety-one".