2989381 has 4 divisors (see below), whose sum is σ = 2997100. Its totient is φ = 2981664.

The previous prime is 2989373. The next prime is 2989391. The reversal of 2989381 is 1839892.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 872356 = 1455^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 2989381 - 2³ = 2989373 is a prime.

It is a super-2 number, since 2×2989381² = 17872797526322, which contains 22 as substring.

It is a Duffinian number.

2989381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2989321) 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, 3246 + ... + 4063.

It is an arithmetic number, because the mean of its divisors is an integer number (749275).

2^2989381 is an apocalyptic number.

It is an amenable number.

2989381 is a deficient number, since it is larger than the sum of its proper divisors (7719).

2989381 is an equidigital number, since it uses as much as digits as its factorization.

2989381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718.

The product of its digits is 31104, while the sum is 40.

The square root of 2989381 is about 1728.9826488430. The cubic root of 2989381 is about 144.0545864297.

The spelling of 2989381 in words is "two million, nine hundred eighty-nine thousand, three hundred eighty-one".