7821934 has 4 divisors (see below), whose sum is σ = 11732904. Its totient is φ = 3910966.

The previous prime is 7821917. The next prime is 7821937. The reversal of 7821934 is 4391287.

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

It is a super-2 number, since 2×7821934² = 122365303000712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7821934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1955482 + ... + 1955485.

It is an arithmetic number, because the mean of its divisors is an integer number (2933226).

Almost surely, 2^7821934 is an apocalyptic number.

7821934 is a deficient number, since it is larger than the sum of its proper divisors (3910970).

7821934 is a wasteful number, since it uses less digits than its factorization.

7821934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910969.

The product of its digits is 12096, while the sum is 34.

The square root of 7821934 is about 2796.7720679383. The cubic root of 7821934 is about 198.5049689235.

The spelling of 7821934 in words is "seven million, eight hundred twenty-one thousand, nine hundred thirty-four".