3988170961 has 2 divisors, whose sum is σ = 3988170962. Its totient is φ = 3988170960.

The previous prime is 3988170959. The next prime is 3988170971. The reversal of 3988170961 is 1690718893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2941001361 + 1047169600 = 54231^2 + 32360^2 .

It is a cyclic number.

It is not a de Polignac number, because 3988170961 - 2¹ = 3988170959 is a prime.

It is a super-2 number, since 2×3988170961² = 31811015228327327042, which contains 22 as substring.

Together with 3988170959, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3988170899 and 3988170908.

It is not a weakly prime, because it can be changed into another prime (3988170971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994085480 + 1994085481.

It is an arithmetic number, because the mean of its divisors is an integer number (1994085481).

Almost surely, 2^3988170961 is an apocalyptic number.

It is an amenable number.

3988170961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988170961 is an equidigital number, since it uses as much as digits as its factorization.

3988170961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 3988170961 is about 63151.9671981800. The cubic root of 3988170961 is about 1585.8347211903.

The spelling of 3988170961 in words is "three billion, nine hundred eighty-eight million, one hundred seventy thousand, nine hundred sixty-one".