398937903 has 16 divisors (see below), whose sum is σ = 654667776. Its totient is φ = 210428640.

The previous prime is 398937901. The next prime is 398937907. The reversal of 398937903 is 309739893.

It is a happy number.

It is not a de Polignac number, because 398937903 - 2¹ = 398937901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398937901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730383 + ... + 730928.

It is an arithmetic number, because the mean of its divisors is an integer number (40916736).

Almost surely, 2^398937903 is an apocalyptic number.

398937903 is a deficient number, since it is larger than the sum of its proper divisors (255729873).

398937903 is a wasteful number, since it uses less digits than its factorization.

398937903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461334.

The product of its (nonzero) digits is 1102248, while the sum is 51.

The square root of 398937903 is about 19973.4299257789. The cubic root of 398937903 is about 736.1535885508.

The spelling of 398937903 in words is "three hundred ninety-eight million, nine hundred thirty-seven thousand, nine hundred three".