3989098901421 has 18 divisors (see below), whose sum is σ = 6081257886990. Its totient is φ = 2519430883056.

The previous prime is 3989098901363. The next prime is 3989098901429. The reversal of 3989098901421 is 1241098909893.

3989098901421 is a `hidden beast` number, since 39 + 8 + 9 + 0 + 98 + 90 + 1 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2018135613321 + 1970963288100 = 1420611^2 + 1403910^2 .

It is not a de Polignac number, because 3989098901421 - 2⁹ = 3989098900909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989098901429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 613893166 + ... + 613899663.

Almost surely, 2^{3989098901421} is an apocalyptic number.

It is an amenable number.

3989098901421 is a deficient number, since it is larger than the sum of its proper divisors (2092158985569).

3989098901421 is a wasteful number, since it uses less digits than its factorization.

3989098901421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227792873 (or 1227792851 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The spelling of 3989098901421 in words is "three trillion, nine hundred eighty-nine billion, ninety-eight million, nine hundred one thousand, four hundred twenty-one".