9999807 has 8 divisors (see below), whose sum is σ = 13347840. Its totient is φ = 6659160.

The previous prime is 9999761. The next prime is 9999823. The reversal of 9999807 is 7089999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9999807 - 2¹⁴ = 9983423 is a prime.

It is a super-2 number, since 2×9999807² = 199992280074498, which contains 22 as substring.

9999807 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9999807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3682 + ... + 5792.

It is an arithmetic number, because the mean of its divisors is an integer number (1668480).

Almost surely, 2^9999807 is an apocalyptic number.

9999807 is a deficient number, since it is larger than the sum of its proper divisors (3348033).

9999807 is a wasteful number, since it uses less digits than its factorization.

9999807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693.

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 9999807 is about 3162.2471440417. The cubic root of 9999807 is about 215.4420829746.

The spelling of 9999807 in words is "nine million, nine hundred ninety-nine thousand, eight hundred seven".