198406913 has 16 divisors (see below), whose sum is σ = 215523840. Its totient is φ = 182217600.

The previous prime is 198406907. The next prime is 198406927. The reversal of 198406913 is 319604891.

198406913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198406913 - 2⁸ = 198406657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198406933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44918 + ... + 49136.

It is an arithmetic number, because the mean of its divisors is an integer number (13470240).

Almost surely, 2^198406913 is an apocalyptic number.

It is an amenable number.

198406913 is a deficient number, since it is larger than the sum of its proper divisors (17116927).

198406913 is a wasteful number, since it uses less digits than its factorization.

198406913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 198406913 is about 14085.6988821996. The cubic root of 198406913 is about 583.2466683404.

The spelling of 198406913 in words is "one hundred ninety-eight million, four hundred six thousand, nine hundred thirteen".