3899011021 has 16 divisors (see below), whose sum is σ = 3966782400. Its totient is φ = 3832063488.

The previous prime is 3899011001. The next prime is 3899011073. The reversal of 3899011021 is 1201109983.

It is a cyclic number.

It is not a de Polignac number, because 3899011021 - 2²⁹ = 3362140109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899011001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11045181 + ... + 11045533.

It is an arithmetic number, because the mean of its divisors is an integer number (247923900).

Almost surely, 2^3899011021 is an apocalyptic number.

It is an amenable number.

3899011021 is a deficient number, since it is larger than the sum of its proper divisors (67771379).

3899011021 is a wasteful number, since it uses less digits than its factorization.

3899011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 3899011021 is about 62442.0613128683. The cubic root of 3899011021 is about 1573.9278529737.

The spelling of 3899011021 in words is "three billion, eight hundred ninety-nine million, eleven thousand, twenty-one".