199609401 has 8 divisors (see below), whose sum is σ = 266291424. Its totient is φ = 133000160.

The previous prime is 199609381. The next prime is 199609457. The reversal of 199609401 is 104906991.

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 199609401 - 2⁵ = 199609369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199609401.

It is not an unprimeable number, because it can be changed into a prime (199609301) 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, 11436 + ... + 23021.

It is an arithmetic number, because the mean of its divisors is an integer number (33286428).

Almost surely, 2^199609401 is an apocalyptic number.

It is an amenable number.

199609401 is a deficient number, since it is larger than the sum of its proper divisors (66682023).

199609401 is a wasteful number, since it uses less digits than its factorization.

199609401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36391.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 199609401 is about 14128.3191144594. The cubic root of 199609401 is about 584.4225933994.

The spelling of 199609401 in words is "one hundred ninety-nine million, six hundred nine thousand, four hundred one".