3999152169 has 10 divisors (see below), whose sum is σ = 5974042250. Its totient is φ = 2666101392.

The previous prime is 3999152137. The next prime is 3999152191. The reversal of 3999152169 is 9612519993.

3999152169 is a `hidden beast` number, since 399 + 91 + 5 + 2 + 169 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2008832400 + 1990319769 = 44820^2 + 44613^2 .

It is not a de Polignac number, because 3999152169 - 2⁵ = 3999152137 is a prime.

It is a super-2 number, since 2×3999152169² = 31986436141634809122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999102169) 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 9 ways as a sum of consecutive naturals, for example, 24686044 + ... + 24686205.

It is an arithmetic number, because the mean of its divisors is an integer number (597404225).

Almost surely, 2^3999152169 is an apocalyptic number.

It is an amenable number.

3999152169 is a deficient number, since it is larger than the sum of its proper divisors (1974890081).

3999152169 is an equidigital number, since it uses as much as digits as its factorization.

3999152169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49372261 (or 49372252 counting only the distinct ones).

The product of its digits is 1180980, while the sum is 54.

The square root of 3999152169 is about 63238.8501555808. The cubic root of 3999152169 is about 1587.2888900582.

The spelling of 3999152169 in words is "three billion, nine hundred ninety-nine million, one hundred fifty-two thousand, one hundred sixty-nine".