3989929 has 2 divisors, whose sum is σ = 3989930. Its totient is φ = 3989928.

The previous prime is 3989903. The next prime is 3989941. The reversal of 3989929 is 9299893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3143529 + 846400 = 1773^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989929 - 2⁵ = 3989897 is a prime.

It is not a weakly prime, because it can be changed into another prime (3989989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994964 + 1994965.

It is an arithmetic number, because the mean of its divisors is an integer number (1994965).

Almost surely, 2^3989929 is an apocalyptic number.

It is an amenable number.

3989929 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989929 is an equidigital number, since it uses as much as digits as its factorization.

3989929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 49.

The square root of 3989929 is about 1997.4806632356. The cubic root of 3989929 is about 158.6067705998.

The spelling of 3989929 in words is "three million, nine hundred eighty-nine thousand, nine hundred twenty-nine".