8490399 has 4 divisors (see below), whose sum is σ = 11320536. Its totient is φ = 5660264.

The previous prime is 8490389. The next prime is 8490401. The reversal of 8490399 is 9930948.

8490399 is nontrivially palindromic in base 7.

8490399 is digitally balanced in base 2 and base 4, because in such bases 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 8490399 - 2⁷ = 8490271 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8490399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8490379) 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, 1415064 + ... + 1415069.

It is an arithmetic number, because the mean of its divisors is an integer number (2830134).

Almost surely, 2^8490399 is an apocalyptic number.

8490399 is a deficient number, since it is larger than the sum of its proper divisors (2830137).

8490399 is a wasteful number, since it uses less digits than its factorization.

8490399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830136.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 8490399 is about 2913.8289242850. The cubic root of 8490399 is about 204.0058869889.

The spelling of 8490399 in words is "eight million, four hundred ninety thousand, three hundred ninety-nine".