999052021 has 8 divisors (see below), whose sum is σ = 1090620000. Its totient is φ = 907608240.

The previous prime is 999052013. The next prime is 999052027. The reversal of 999052021 is 120250999.

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

It is not a de Polignac number, because 999052021 - 2³ = 999052013 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 (999052027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13806 + ... + 46783.

It is an arithmetic number, because the mean of its divisors is an integer number (136327500).

Almost surely, 2^999052021 is an apocalyptic number.

It is an amenable number.

999052021 is a deficient number, since it is larger than the sum of its proper divisors (91567979).

999052021 is a wasteful number, since it uses less digits than its factorization.

999052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62099.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 999052021 is about 31607.7841836469. The cubic root of 999052021 is about 999.6839070958.

It can be divided in two parts, 99905 and 2021, that added together give a triangular number (101926 = T₄₅₁).

The spelling of 999052021 in words is "nine hundred ninety-nine million, fifty-two thousand, twenty-one".