999211442 has 4 divisors (see below), whose sum is σ = 1498817166. Its totient is φ = 499605720.

The previous prime is 999211391. The next prime is 999211457. The reversal of 999211442 is 244112999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 903543481 + 95667961 = 30059^2 + 9781^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 999211442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249802859 + ... + 249802862.

Almost surely, 2^999211442 is an apocalyptic number.

999211442 is a deficient number, since it is larger than the sum of its proper divisors (499605724).

999211442 is a wasteful number, since it uses less digits than its factorization.

999211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499605723.

The product of its digits is 46656, while the sum is 41.

The square root of 999211442 is about 31610.3059460044. The cubic root of 999211442 is about 999.7370782115.

The spelling of 999211442 in words is "nine hundred ninety-nine million, two hundred eleven thousand, four hundred forty-two".