3998447357 has 2 divisors, whose sum is σ = 3998447358. Its totient is φ = 3998447356.

The previous prime is 3998447329. The next prime is 3998447393. The reversal of 3998447357 is 7537448993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3996894841 + 1552516 = 63221^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998447357 - 2⁶ = 3998447293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3998447296 and 3998447305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998447317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999223678 + 1999223679.

It is an arithmetic number, because the mean of its divisors is an integer number (1999223679).

Almost surely, 2^3998447357 is an apocalyptic number.

It is an amenable number.

3998447357 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998447357 is an equidigital number, since it uses as much as digits as its factorization.

3998447357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 59.

The square root of 3998447357 is about 63233.2772913124. The cubic root of 3998447357 is about 1587.1956364602.

The spelling of 3998447357 in words is "three billion, nine hundred ninety-eight million, four hundred forty-seven thousand, three hundred fifty-seven".