7081399 has 4 divisors (see below), whose sum is σ = 7626136. Its totient is φ = 6536664.

The previous prime is 7081387. The next prime is 7081411. The reversal of 7081399 is 9931807.

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

It is an interprime number because it is at equal distance from previous prime (7081387) and next prime (7081411).

It is a cyclic number.

It is not a de Polignac number, because 7081399 - 2¹⁵ = 7048631 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 (7081339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272349 + ... + 272374.

It is an arithmetic number, because the mean of its divisors is an integer number (1906534).

Almost surely, 2^7081399 is an apocalyptic number.

7081399 is a deficient number, since it is larger than the sum of its proper divisors (544737).

7081399 is a wasteful number, since it uses less digits than its factorization.

7081399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544736.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7081399 is about 2661.0898143430. The cubic root of 7081399 is about 192.0317420755.

The spelling of 7081399 in words is "seven million, eighty-one thousand, three hundred ninety-nine".