999200001 has 4 divisors (see below), whose sum is σ = 1332266672. Its totient is φ = 666133332.

The previous prime is 999199991. The next prime is 999200003. The reversal of 999200001 is 100002999.

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 not a de Polignac number, because 999200001 - 2²¹ = 997102849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999200003) 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, 166533331 + ... + 166533336.

It is an arithmetic number, because the mean of its divisors is an integer number (333066668).

Almost surely, 2^999200001 is an apocalyptic number.

It is an amenable number.

999200001 is a deficient number, since it is larger than the sum of its proper divisors (333066671).

999200001 is a wasteful number, since it uses less digits than its factorization.

999200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333066670.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 999200001 is about 31610.1249760263. The cubic root of 999200001 is about 999.7332625241.

The spelling of 999200001 in words is "nine hundred ninety-nine million, two hundred thousand, one".