999722601 has 16 divisors (see below), whose sum is σ = 1559022400. Its totient is φ = 631403424.

The previous prime is 999722599. The next prime is 999722617. The reversal of 999722601 is 106227999.

It is not a de Polignac number, because 999722601 - 2¹ = 999722599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999722201) 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 15 ways as a sum of consecutive naturals, for example, 973876 + ... + 974901.

It is an arithmetic number, because the mean of its divisors is an integer number (97438900).

Almost surely, 2^999722601 is an apocalyptic number.

It is an amenable number.

999722601 is a deficient number, since it is larger than the sum of its proper divisors (559299799).

999722601 is a wasteful number, since it uses less digits than its factorization.

999722601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948805 (or 1948799 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 999722601 is about 31618.3902341659. The cubic root of 999722601 is about 999.9075251153.

The spelling of 999722601 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, six hundred one".