8002391 has 4 divisors (see below), whose sum is σ = 8030952. Its totient is φ = 7973832.

The previous prime is 8002381. The next prime is 8002399. The reversal of 8002391 is 1932008.

8002391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8002391 - 2¹⁴ = 7986007 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 (8002399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13856 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (2007738).

Almost surely, 2^8002391 is an apocalyptic number.

8002391 is a deficient number, since it is larger than the sum of its proper divisors (28561).

8002391 is a wasteful number, since it uses less digits than its factorization.

8002391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28560.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 8002391 is about 2828.8497662478. The cubic root of 8002391 is about 200.0199230153.

Adding to 8002391 its reverse (1932008), we get a palindrome (9934399).

The spelling of 8002391 in words is "eight million, two thousand, three hundred ninety-one".