2979309 has 4 divisors (see below), whose sum is σ = 3972416. Its totient is φ = 1986204.

The previous prime is 2979307. The next prime is 2979311. The reversal of 2979309 is 9039792.

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 an interprime number because it is at equal distance from previous prime (2979307) and next prime (2979311).

It is not a de Polignac number, because 2979309 - 2¹ = 2979307 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2979307) 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, 496549 + ... + 496554.

It is an arithmetic number, because the mean of its divisors is an integer number (993104).

2^2979309 is an apocalyptic number.

It is an amenable number.

2979309 is a deficient number, since it is larger than the sum of its proper divisors (993107).

2979309 is an equidigital number, since it uses as much as digits as its factorization.

2979309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993106.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 2979309 is about 1726.0674957834. The cubic root of 2979309 is about 143.8926186335.

The spelling of 2979309 in words is "two million, nine hundred seventy-nine thousand, three hundred nine".