2909678 has 4 divisors (see below), whose sum is σ = 4364520. Its totient is φ = 1454838.

The previous prime is 2909671. The next prime is 2909689. The reversal of 2909678 is 8769092.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2909671) 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 as a sum of consecutive naturals, namely, 727418 + ... + 727421.

It is an arithmetic number, because the mean of its divisors is an integer number (1091130).

2^2909678 is an apocalyptic number.

2909678 is a deficient number, since it is larger than the sum of its proper divisors (1454842).

2909678 is a wasteful number, since it uses less digits than its factorization.

2909678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454841.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 2909678 is about 1705.7778284407. Note that the first 3 decimals coincide. The cubic root of 2909678 is about 142.7627735796.

The spelling of 2909678 in words is "two million, nine hundred nine thousand, six hundred seventy-eight".