2979947 has 4 divisors (see below), whose sum is σ = 3155256. Its totient is φ = 2804640.

The previous prime is 2979931. The next prime is 2979967. The reversal of 2979947 is 7499792.

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

It is a cyclic number.

It is not a de Polignac number, because 2979947 - 2⁴ = 2979931 is a prime.

It is a super-3 number, since 3×2979947³ = 79386540124536933369, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 9 + 7² + 9² + 9⁵ + 4³ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2979917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87629 + ... + 87662.

It is an arithmetic number, because the mean of its divisors is an integer number (788814).

2^2979947 is an apocalyptic number.

2979947 is a deficient number, since it is larger than the sum of its proper divisors (175309).

2979947 is a wasteful number, since it uses less digits than its factorization.

2979947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175308.

The product of its digits is 285768, while the sum is 47.

The square root of 2979947 is about 1726.2522990571. The cubic root of 2979947 is about 143.9028891289.

The spelling of 2979947 in words is "two million, nine hundred seventy-nine thousand, nine hundred forty-seven".