3898031491 has 4 divisors (see below), whose sum is σ = 4032446400. Its totient is φ = 3763616584.

The previous prime is 3898031461. The next prime is 3898031519. The reversal of 3898031491 is 1941308983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941308983 = 19 ⋅102174157.

It is a cyclic number.

It is not a de Polignac number, because 3898031491 - 2⁹ = 3898030979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898031441) 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 3 ways as a sum of consecutive naturals, for example, 67207411 + ... + 67207468.

It is an arithmetic number, because the mean of its divisors is an integer number (1008111600).

Almost surely, 2^3898031491 is an apocalyptic number.

3898031491 is a deficient number, since it is larger than the sum of its proper divisors (134414909).

3898031491 is a wasteful number, since it uses less digits than its factorization.

3898031491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134414908.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 3898031491 is about 62434.2173091006. The cubic root of 3898031491 is about 1573.7960384644.

The spelling of 3898031491 in words is "three billion, eight hundred ninety-eight million, thirty-one thousand, four hundred ninety-one".