3971898529 has 27 divisors (see below), whose sum is σ = 4372394481. Its totient is φ = 3607436520.

The previous prime is 3971898521. The next prime is 3971898617. The reversal of 3971898529 is 9258981793.

The square root of 3971898529 is 63023.

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

It is not a de Polignac number, because 3971898529 - 2³ = 3971898521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3971898521) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 37120494 + ... + 37120600.

Almost surely, 2^3971898529 is an apocalyptic number.

3971898529 is the 63023-rd square number.

3971898529 is the 31512-nd centered octagonal number.

It is an amenable number.

3971898529 is a deficient number, since it is larger than the sum of its proper divisors (400495952).

3971898529 is an equidigital number, since it uses as much as digits as its factorization.

3971898529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 157 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 61.

The cubic root of 3971898529 is about 1583.6749538421.

It can be divided in two parts, 3971 and 898529, that added together give a square (902500 = 950²).

The spelling of 3971898529 in words is "three billion, nine hundred seventy-one million, eight hundred ninety-eight thousand, five hundred twenty-nine".