2981393 has 4 divisors (see below), whose sum is σ = 3022308. Its totient is φ = 2940480.

The previous prime is 2981387. The next prime is 2981399. The reversal of 2981393 is 3931892.

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 (2981387) and next prime (2981399).

It can be written as a sum of positive squares in 2 ways, for example, as 2289169 + 692224 = 1513^2 + 832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2981393 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 (2981399) 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, 20348 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (755577).

2^2981393 is an apocalyptic number.

It is an amenable number.

2981393 is a deficient number, since it is larger than the sum of its proper divisors (40915).

2981393 is an equidigital number, since it uses as much as digits as its factorization.

2981393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40914.

The product of its digits is 11664, while the sum is 35.

The square root of 2981393 is about 1726.6710746404. The cubic root of 2981393 is about 143.9261613470.

The spelling of 2981393 in words is "two million, nine hundred eighty-one thousand, three hundred ninety-three".