199145959 has 8 divisors (see below), whose sum is σ = 201017088. Its totient is φ = 197283840.

The previous prime is 199145911. The next prime is 199145981. The reversal of 199145959 is 959541991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 199145959 - 2⁷ = 199145831 is a prime.

It is a super-2 number, since 2×199145959² = 79318225972059362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199142959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47059 + ... + 51115.

It is an arithmetic number, because the mean of its divisors is an integer number (25127136).

Almost surely, 2^199145959 is an apocalyptic number.

199145959 is a deficient number, since it is larger than the sum of its proper divisors (1871129).

199145959 is a wasteful number, since it uses less digits than its factorization.

199145959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505.

The product of its digits is 656100, while the sum is 52.

The square root of 199145959 is about 14111.9084109840. The cubic root of 199145959 is about 583.9699496250.

The spelling of 199145959 in words is "one hundred ninety-nine million, one hundred forty-five thousand, nine hundred fifty-nine".