3898637 has 2 divisors, whose sum is σ = 3898638. Its totient is φ = 3898636.

The previous prime is 3898633. The next prime is 3898639. The reversal of 3898637 is 7368983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2886601 + 1012036 = 1699^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 3898637 - 2² = 3898633 is a prime.

Together with 3898639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3898633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949318 + 1949319.

It is an arithmetic number, because the mean of its divisors is an integer number (1949319).

Almost surely, 2^3898637 is an apocalyptic number.

It is an amenable number.

3898637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3898637 is an equidigital number, since it uses as much as digits as its factorization.

3898637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 3898637 is about 1974.4966447173. The cubic root of 3898637 is about 157.3877523895.

The spelling of 3898637 in words is "three million, eight hundred ninety-eight thousand, six hundred thirty-seven".