999142207 has 16 divisors (see below), whose sum is σ = 1212148800. Its totient is φ = 803962368.

The previous prime is 999142187. The next prime is 999142217. The reversal of 999142207 is 702241999.

It is not a de Polignac number, because 999142207 - 2¹⁵ = 999109439 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 (999142217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36669 + ... + 57817.

It is an arithmetic number, because the mean of its divisors is an integer number (75759300).

Almost surely, 2^999142207 is an apocalyptic number.

999142207 is a deficient number, since it is larger than the sum of its proper divisors (213006593).

999142207 is a wasteful number, since it uses less digits than its factorization.

999142207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21570.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 999142207 is about 31609.2107936911. The cubic root of 999142207 is about 999.7139872045.

The spelling of 999142207 in words is "nine hundred ninety-nine million, one hundred forty-two thousand, two hundred seven".