3898453657 has 4 divisors (see below), whose sum is σ = 4455375616. Its totient is φ = 3341531700.

The previous prime is 3898453633. The next prime is 3898453661. The reversal of 3898453657 is 7563548983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7563548983 = 163 ⋅46402141.

It is a cyclic number.

It is not a de Polignac number, because 3898453657 - 2¹⁹ = 3897929369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898453667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278460969 + ... + 278460982.

It is an arithmetic number, because the mean of its divisors is an integer number (1113843904).

Almost surely, 2^3898453657 is an apocalyptic number.

It is an amenable number.

3898453657 is a deficient number, since it is larger than the sum of its proper divisors (556921959).

3898453657 is an equidigital number, since it uses as much as digits as its factorization.

3898453657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556921958.

The product of its digits is 21772800, while the sum is 58.

The square root of 3898453657 is about 62437.5981040270. The cubic root of 3898453657 is about 1573.8528516872.

The spelling of 3898453657 in words is "three billion, eight hundred ninety-eight million, four hundred fifty-three thousand, six hundred fifty-seven".