7921814 has 16 divisors (see below), whose sum is σ = 12467520. Its totient is φ = 3769920.

The previous prime is 7921787. The next prime is 7921817. The reversal of 7921814 is 4181297.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921817) 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, 3299 + ... + 5169.

It is an arithmetic number, because the mean of its divisors is an integer number (779220).

Almost surely, 2^7921814 is an apocalyptic number.

7921814 is a deficient number, since it is larger than the sum of its proper divisors (4545706).

7921814 is a wasteful number, since it uses less digits than its factorization.

7921814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975.

The product of its digits is 4032, while the sum is 32.

The square root of 7921814 is about 2814.5717258581. The cubic root of 7921814 is about 199.3463158126.

The spelling of 7921814 in words is "seven million, nine hundred twenty-one thousand, eight hundred fourteen".