3898440191 has 2 divisors, whose sum is σ = 3898440192. Its totient is φ = 3898440190.

The previous prime is 3898440173. The next prime is 3898440253. The reversal of 3898440191 is 1910448983.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3898440191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3898443191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949220095 + 1949220096.

It is an arithmetic number, because the mean of its divisors is an integer number (1949220096).

Almost surely, 2^3898440191 is an apocalyptic number.

3898440191 is a deficient number, since it is larger than the sum of its proper divisors (1).

3898440191 is an equidigital number, since it uses as much as digits as its factorization.

3898440191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 3898440191 is about 62437.4902682675. The cubic root of 3898440191 is about 1573.8510395561.

The spelling of 3898440191 in words is "three billion, eight hundred ninety-eight million, four hundred forty thousand, one hundred ninety-one".