9999372 has 12 divisors (see below), whose sum is σ = 23331896.
Its totient is φ = 3333120.
The previous prime is 9999347. The next prime is 9999397. The reversal of 9999372 is 2739999.
It can be divided in two parts, 9999 and 372, that multiplied together give a triangular number (3719628 = T2727).
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (9999347) and next prime (9999397).
It is a tau number, because it is divible by the number of its divisors (12).
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416629 + ... + 416652.
Almost surely, 29999372 is an apocalyptic number.
It is an amenable number.
9999372 is an abundant number, since it is smaller than the sum of its proper divisors (13332524).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9999372 is a wasteful number, since it uses less digits than its factorization.
9999372 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 833288 (or 833286 counting only the distinct ones).
The product of its digits is 275562, while the sum is 48.
The square root of 9999372 is about 3162.1783630909.
The cubic root of 9999372 is about 215.4389589588.
The spelling of 9999372 in words is "nine million, nine hundred ninety-nine thousand, three hundred seventy-two".