2918649 has 8 divisors (see below), whose sum is σ = 3905440. Its totient is φ = 1938816.

The previous prime is 2918621. The next prime is 2918689. The reversal of 2918649 is 9468192.

2918649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2918649 - 2⁷ = 2918521 is a prime.

It is a Duffinian number.

2918649 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2918689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664 + ... + 2505.

It is an arithmetic number, because the mean of its divisors is an integer number (488180).

2^2918649 is an apocalyptic number.

It is an amenable number.

2918649 is a deficient number, since it is larger than the sum of its proper divisors (986791).

2918649 is a wasteful number, since it uses less digits than its factorization.

2918649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479.

The product of its digits is 31104, while the sum is 39.

The square root of 2918649 is about 1708.4053968540. The cubic root of 2918649 is about 142.9093431617.

The spelling of 2918649 in words is "two million, nine hundred eighteen thousand, six hundred forty-nine".