2981864393 has 4 divisors (see below), whose sum is σ = 2982130560. Its totient is φ = 2981598228.

The previous prime is 2981864383. The next prime is 2981864399. The reversal of 2981864393 is 3934681892.

It is a happy number.

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 2981864393 - 2¹⁸ = 2981602249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2981864399) 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, 115505 + ... + 138942.

It is an arithmetic number, because the mean of its divisors is an integer number (745532640).

Almost surely, 2^2981864393 is an apocalyptic number.

It is an amenable number.

2981864393 is a deficient number, since it is larger than the sum of its proper divisors (266167).

2981864393 is a wasteful number, since it uses less digits than its factorization.

2981864393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266166.

The product of its digits is 2239488, while the sum is 53.

The square root of 2981864393 is about 54606.4501043604. The cubic root of 2981864393 is about 1439.3374641542.

The spelling of 2981864393 in words is "two billion, nine hundred eighty-one million, eight hundred sixty-four thousand, three hundred ninety-three".