7681399 has 8 divisors (see below), whose sum is σ = 8872848. Its totient is φ = 6572160.

The previous prime is 7681369. The next prime is 7681403. The reversal of 7681399 is 9931867.

7681399 is digitally balanced in base 3, 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 a cyclic number.

It is not a de Polignac number, because 7681399 - 2⁵ = 7681367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681369) 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, 20352 + ... + 20725.

It is an arithmetic number, because the mean of its divisors is an integer number (1109106).

Almost surely, 2^7681399 is an apocalyptic number.

7681399 is a deficient number, since it is larger than the sum of its proper divisors (1191449).

7681399 is a wasteful number, since it uses less digits than its factorization.

7681399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41105.

The product of its digits is 81648, while the sum is 43.

The square root of 7681399 is about 2771.5336909372. The cubic root of 7681399 is about 197.3089451868.

The spelling of 7681399 in words is "seven million, six hundred eighty-one thousand, three hundred ninety-nine".