3899501921 has 8 divisors (see below), whose sum is σ = 4529632704. Its totient is φ = 3287635920.

The previous prime is 3899501887. The next prime is 3899501941. The reversal of 3899501921 is 1291059983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3899501921 - 2¹⁸ = 3899239777 is a prime.

It is a super-2 number, since 2×3899501921² = 30412230463765380482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3899501941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4565735 + ... + 4566588.

It is an arithmetic number, because the mean of its divisors is an integer number (566204088).

Almost surely, 2^3899501921 is an apocalyptic number.

It is an amenable number.

3899501921 is a deficient number, since it is larger than the sum of its proper divisors (630130783).

3899501921 is an equidigital number, since it uses as much as digits as its factorization.

3899501921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132391.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 3899501921 is about 62445.9920331161. The cubic root of 3899501921 is about 1573.9939046600.

The spelling of 3899501921 in words is "three billion, eight hundred ninety-nine million, five hundred one thousand, nine hundred twenty-one".