199961458 has 8 divisors (see below), whose sum is σ = 301738752. Its totient is φ = 99381876.

The previous prime is 199961449. The next prime is 199961459. The reversal of 199961458 is 854169991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (199961459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299010 + ... + 299677.

It is an arithmetic number, because the mean of its divisors is an integer number (37717344).

Almost surely, 2^199961458 is an apocalyptic number.

199961458 is a deficient number, since it is larger than the sum of its proper divisors (101777294).

199961458 is a wasteful number, since it uses less digits than its factorization.

199961458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598856.

The product of its digits is 699840, while the sum is 52.

The square root of 199961458 is about 14140.7728925968. The cubic root of 199961458 is about 584.7659793987.

The spelling of 199961458 in words is "one hundred ninety-nine million, nine hundred sixty-one thousand, four hundred fifty-eight".