999412990 has 8 divisors (see below), whose sum is σ = 1798943400. Its totient is φ = 399765192.

The previous prime is 999412987. The next prime is 999412991. The reversal of 999412990 is 99214999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999412991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49970640 + ... + 49970659.

It is an arithmetic number, because the mean of its divisors is an integer number (224867925).

Almost surely, 2^999412990 is an apocalyptic number.

999412990 is a deficient number, since it is larger than the sum of its proper divisors (799530410).

999412990 is a wasteful number, since it uses less digits than its factorization.

999412990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99941306.

The product of its (nonzero) digits is 472392, while the sum is 52.

The square root of 999412990 is about 31613.4937961624. The cubic root of 999412990 is about 999.8042917008.

The spelling of 999412990 in words is "nine hundred ninety-nine million, four hundred twelve thousand, nine hundred ninety".