800040007 has 4 divisors (see below), whose sum is σ = 861581560. Its totient is φ = 738498456.

The previous prime is 800039993. The next prime is 800040019. The reversal of 800040007 is 700040008.

It is a happy number.

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 800040007 - 2⁷ = 800039879 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 (800040047) 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, 30770757 + ... + 30770782.

It is an arithmetic number, because the mean of its divisors is an integer number (215395390).

Almost surely, 2^800040007 is an apocalyptic number.

800040007 is a deficient number, since it is larger than the sum of its proper divisors (61541553).

800040007 is a wasteful number, since it uses less digits than its factorization.

800040007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61541552.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 800040007 is about 28284.9784691451. The cubic root of 800040007 is about 928.3332411350. Note that the first 3 decimals are identical.

Subtracting from 800040007 its reverse (700040008), we obtain a palindrome (99999999).

The spelling of 800040007 in words is "eight hundred million, forty thousand, seven".