3898129 has 4 divisors (see below), whose sum is σ = 3902500. Its totient is φ = 3893760.

The previous prime is 3898123. The next prime is 3898163. The reversal of 3898129 is 9218983.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 3415104 = 695^2 + 1848^2 .

It is a cyclic number.

It is not a de Polignac number, because 3898129 - 2⁷ = 3898001 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a deceptive number, since it divides R_3898128.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3898091 and 3898100.

It is not an unprimeable number, because it can be changed into a prime (3898123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (975625).

It is a Poulet number, since it divides 2^3898128-1.

Almost surely, 2^3898129 is an apocalyptic number.

3898129 is the 1249-th heptagonal number.

It is an amenable number.

3898129 is a deficient number, since it is larger than the sum of its proper divisors (4371).

3898129 is a wasteful number, since it uses less digits than its factorization.

3898129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370.

The product of its digits is 31104, while the sum is 40.

The square root of 3898129 is about 1974.3680001459. The cubic root of 3898129 is about 157.3809161156.

The spelling of 3898129 in words is "three million, eight hundred ninety-eight thousand, one hundred twenty-nine".