398639603 has 4 divisors (see below), whose sum is σ = 399158760. Its totient is φ = 398120448.

The previous prime is 398639599. The next prime is 398639651. The reversal of 398639603 is 306936893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398639603 - 2² = 398639599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398639663) 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, 258425 + ... + 259962.

It is an arithmetic number, because the mean of its divisors is an integer number (99789690).

Almost surely, 2^398639603 is an apocalyptic number.

398639603 is a deficient number, since it is larger than the sum of its proper divisors (519157).

398639603 is an equidigital number, since it uses as much as digits as its factorization.

398639603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519156.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 398639603 is about 19965.9611088472. The cubic root of 398639603 is about 735.9700600957.

The spelling of 398639603 in words is "three hundred ninety-eight million, six hundred thirty-nine thousand, six hundred three".