9967599 has 6 divisors (see below), whose sum is σ = 14397656. Its totient is φ = 6645060.

The previous prime is 9967597. The next prime is 9967603. The reversal of 9967599 is 9957699.

It is not a de Polignac number, because 9967599 - 2¹ = 9967597 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 (9967597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553747 + ... + 553764.

Almost surely, 2^9967599 is an apocalyptic number.

9967599 is a deficient number, since it is larger than the sum of its proper divisors (4430057).

9967599 is a wasteful number, since it uses less digits than its factorization.

9967599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107517 (or 1107514 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 54.

The square root of 9967599 is about 3157.1504557116. The cubic root of 9967599 is about 215.2105311131.

The spelling of 9967599 in words is "nine million, nine hundred sixty-seven thousand, five hundred ninety-nine".