999061801 has 8 divisors (see below), whose sum is σ = 1033566408. Its totient is φ = 965040000.

The previous prime is 999061783. The next prime is 999061823. The reversal of 999061801 is 108160999.

It can be written as a sum of positive squares in 4 ways, for example, as 12787776 + 986274025 = 3576^2 + 31405^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 999061801 - 2¹³ = 999053609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999061891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116490 + ... + 124771.

It is an arithmetic number, because the mean of its divisors is an integer number (129195801).

Almost surely, 2^999061801 is an apocalyptic number.

999061801 is the 14136-th centered decagonal number.

It is an amenable number.

999061801 is a deficient number, since it is larger than the sum of its proper divisors (34504607).

999061801 is a wasteful number, since it uses less digits than its factorization.

999061801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241403.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 999061801 is about 31607.9388919936. The cubic root of 999061801 is about 999.6871691471.

The spelling of 999061801 in words is "nine hundred ninety-nine million, sixty-one thousand, eight hundred one".