999381769 has 9 divisors (see below), whose sum is σ = 1012609749. Its totient is φ = 986325600.

The previous prime is 999381701. The next prime is 999381793. The reversal of 999381769 is 967183999.

The square root of 999381769 is 31613.

It is a perfect power (a square), and thus also a powerful number.

999381769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14175225 + 985206544 = 3765^2 + 31388^2 .

It is not a de Polignac number, because 999381769 - 2⁷ = 999381641 is a prime.

It is a super-2 number, since 2×999381769² = 1997527840419138722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999381469) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3192757 + ... + 3193069.

Almost surely, 2^999381769 is an apocalyptic number.

999381769 is the 31613-rd square number.

999381769 is the 15807-th centered octagonal number.

It is an amenable number.

999381769 is a deficient number, since it is larger than the sum of its proper divisors (13227980).

999381769 is an frugal number, since it uses more digits than its factorization.

999381769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 414 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 61.

The cubic root of 999381769 is about 999.7938805177.

The spelling of 999381769 in words is "nine hundred ninety-nine million, three hundred eighty-one thousand, seven hundred sixty-nine".