398173963 has 4 divisors (see below), whose sum is σ = 434371608. Its totient is φ = 361976320.

The previous prime is 398173961. The next prime is 398173967. The reversal of 398173963 is 369371893.

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 398173963 - 2¹ = 398173961 is a prime.

It is a super-3 number, since 3×398173963³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (398173961) 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, 18098806 + ... + 18098827.

It is an arithmetic number, because the mean of its divisors is an integer number (108592902).

Almost surely, 2^398173963 is an apocalyptic number.

398173963 is a deficient number, since it is larger than the sum of its proper divisors (36197645).

398173963 is a wasteful number, since it uses less digits than its factorization.

398173963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36197644.

The product of its digits is 734832, while the sum is 49.

The square root of 398173963 is about 19954.2968555647. The cubic root of 398173963 is about 735.6833929620.

The spelling of 398173963 in words is "three hundred ninety-eight million, one hundred seventy-three thousand, nine hundred sixty-three".