3869898409 has 4 divisors (see below), whose sum is σ = 4167582916. Its totient is φ = 3572213904.

The previous prime is 3869898401. The next prime is 3869898427. The reversal of 3869898409 is 9048989683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2428025625 + 1441872784 = 49275^2 + 37972^2 .

It is a cyclic number.

It is not a de Polignac number, because 3869898409 - 2³ = 3869898401 is a prime.

It is a super-2 number, since 2×3869898409² = 29952227391961462562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3869898401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148842234 + ... + 148842259.

It is an arithmetic number, because the mean of its divisors is an integer number (1041895729).

Almost surely, 2^3869898409 is an apocalyptic number.

It is an amenable number.

3869898409 is a deficient number, since it is larger than the sum of its proper divisors (297684507).

3869898409 is a wasteful number, since it uses less digits than its factorization.

3869898409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297684506.

The product of its (nonzero) digits is 26873856, while the sum is 64.

The square root of 3869898409 is about 62208.5075291153. The cubic root of 3869898409 is about 1570.0007314695. Note that the first 3 decimals are identical.

The spelling of 3869898409 in words is "three billion, eight hundred sixty-nine million, eight hundred ninety-eight thousand, four hundred nine".