8406399073 has 4 divisors (see below), whose sum is σ = 8456736960. Its totient is φ = 8356061188.

The previous prime is 8406399019. The next prime is 8406399103. The reversal of 8406399073 is 3709936048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8406399073 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8406399013) 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, 25168693 + ... + 25169026.

It is an arithmetic number, because the mean of its divisors is an integer number (2114184240).

Almost surely, 2^8406399073 is an apocalyptic number.

It is an amenable number.

8406399073 is a deficient number, since it is larger than the sum of its proper divisors (50337887).

8406399073 is a wasteful number, since it uses less digits than its factorization.

8406399073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50337886.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 8406399073 is about 91686.4170583626. The cubic root of 8406399073 is about 2033.3087726467.

The spelling of 8406399073 in words is "eight billion, four hundred six million, three hundred ninety-nine thousand, seventy-three".