3970638169 has 9 divisors (see below), whose sum is σ = 4040709309. Its totient is φ = 3901764960.

The previous prime is 3970638137. The next prime is 3970638179. The reversal of 3970638169 is 9618360793.

The square root of 3970638169 is 63013.

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

3970638169 is digitally balanced in base 2 and base 3, because in such bases 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 126025 + 3970512144 = 355^2 + 63012^2 .

It is not a de Polignac number, because 3970638169 - 2⁵ = 3970638137 is a prime.

It is a super-2 number, since 2×3970638169² = 31531934938239345122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3970638179) 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, 3843277 + ... + 3844309.

It is an arithmetic number, because the mean of its divisors is an integer number (448967701).

Almost surely, 2^3970638169 is an apocalyptic number.

3970638169 is the 63013-rd square number.

3970638169 is the 31507-th centered octagonal number.

It is an amenable number.

3970638169 is a deficient number, since it is larger than the sum of its proper divisors (70071140).

3970638169 is an frugal number, since it uses more digits than its factorization.

3970638169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 52.

The cubic root of 3970638169 is about 1583.5074259197.

The spelling of 3970638169 in words is "three billion, nine hundred seventy million, six hundred thirty-eight thousand, one hundred sixty-nine".