3898387481 has 2 divisors, whose sum is σ = 3898387482. Its totient is φ = 3898387480.

The previous prime is 3898387469. The next prime is 3898387489. The reversal of 3898387481 is 1847838983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3784218256 + 114169225 = 61516^2 + 10685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3898387481 is a prime.

It is a super-2 number, since 2×3898387481² = 30394849904035050722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3898387481.

It is not a weakly prime, because it can be changed into another prime (3898387489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949193740 + 1949193741.

It is an arithmetic number, because the mean of its divisors is an integer number (1949193741).

Almost surely, 2^3898387481 is an apocalyptic number.

It is an amenable number.

3898387481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3898387481 is an equidigital number, since it uses as much as digits as its factorization.

3898387481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 59.

The square root of 3898387481 is about 62437.0681646728. The cubic root of 3898387481 is about 1573.8439462865.

The spelling of 3898387481 in words is "three billion, eight hundred ninety-eight million, three hundred eighty-seven thousand, four hundred eighty-one".