3898437906917 has 2 divisors, whose sum is σ = 3898437906918. Its totient is φ = 3898437906916.

The previous prime is 3898437906871. The next prime is 3898437906941. The reversal of 3898437906917 is 7196097348983.

3898437906917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3859865339716 + 38572567201 = 1964654^2 + 196399^2 .

It is a cyclic number.

It is not a de Polignac number, because 3898437906917 - 2⁸ = 3898437906661 is a prime.

It is a super-2 number, since 2×3898437906917² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3898437906617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949218953458 + 1949218953459.

It is an arithmetic number, because the mean of its divisors is an integer number (1949218953459).

Almost surely, 2^{3898437906917} is an apocalyptic number.

It is an amenable number.

3898437906917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3898437906917 is an equidigital number, since it uses as much as digits as its factorization.

3898437906917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493807104, while the sum is 74.

The spelling of 3898437906917 in words is "three trillion, eight hundred ninety-eight billion, four hundred thirty-seven million, nine hundred six thousand, nine hundred seventeen".