398546387 has 2 divisors, whose sum is σ = 398546388. Its totient is φ = 398546386.

The previous prime is 398546383. The next prime is 398546441. The reversal of 398546387 is 783645893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398546387 - 2² = 398546383 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398546383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199273193 + 199273194.

It is an arithmetic number, because the mean of its divisors is an integer number (199273194).

Almost surely, 2^398546387 is an apocalyptic number.

398546387 is a deficient number, since it is larger than the sum of its proper divisors (1).

398546387 is an equidigital number, since it uses as much as digits as its factorization.

398546387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The square root of 398546387 is about 19963.6265993932. The cubic root of 398546387 is about 735.9126903707.

The spelling of 398546387 in words is "three hundred ninety-eight million, five hundred forty-six thousand, three hundred eighty-seven".