2981909 has 4 divisors (see below), whose sum is σ = 3407904. Its totient is φ = 2555916.

The previous prime is 2981903. The next prime is 2981911. The reversal of 2981909 is 9091892.

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 2981909 - 2⁸ = 2981653 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 (2981903) 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, 212987 + ... + 213000.

It is an arithmetic number, because the mean of its divisors is an integer number (851976).

2^2981909 is an apocalyptic number.

It is an amenable number.

2981909 is a deficient number, since it is larger than the sum of its proper divisors (425995).

2981909 is an equidigital number, since it uses as much as digits as its factorization.

2981909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425994.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2981909 is about 1726.8204886438. The cubic root of 2981909 is about 143.9344641342.

The spelling of 2981909 in words is "two million, nine hundred eighty-one thousand, nine hundred nine".