191199001 has 16 divisors (see below), whose sum is σ = 227232000. Its totient is φ = 157405248.

The previous prime is 191198993. The next prime is 191199007. The reversal of 191199001 is 100991191.

It is not a de Polignac number, because 191199001 - 2³ = 191198993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191199007) 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, 38031 + ... + 42763.

It is an arithmetic number, because the mean of its divisors is an integer number (14202000).

Almost surely, 2^191199001 is an apocalyptic number.

It is an amenable number.

191199001 is a deficient number, since it is larger than the sum of its proper divisors (36032999).

191199001 is a wasteful number, since it uses less digits than its factorization.

191199001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 191199001 is about 13827.4726902641. The cubic root of 191199001 is about 576.0964595802.

The spelling of 191199001 in words is "one hundred ninety-one million, one hundred ninety-nine thousand, one".