7821373 has 8 divisors (see below), whose sum is σ = 8955648. Its totient is φ = 6691344.

The previous prime is 7821371. The next prime is 7821383. The reversal of 7821373 is 3731287.

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

It is a cyclic number.

It is not a de Polignac number, because 7821373 - 2¹ = 7821371 is a prime.

It is a super-2 number, since 2×7821373² = 122347751210258, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁶ + 8⁷ + 2⁵ + 1 + 3³ + 7⁷ + 3¹⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6540 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (1119456).

Almost surely, 2^7821373 is an apocalyptic number.

It is an amenable number.

7821373 is a deficient number, since it is larger than the sum of its proper divisors (1134275).

7821373 is a wasteful number, since it uses less digits than its factorization.

7821373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123.

The product of its digits is 7056, while the sum is 31.

The square root of 7821373 is about 2796.6717719461. The cubic root of 7821373 is about 198.5002231258.

The spelling of 7821373 in words is "seven million, eight hundred twenty-one thousand, three hundred seventy-three".