197901899 has 8 divisors (see below), whose sum is σ = 213340512. Its totient is φ = 182494080.

The previous prime is 197901883. The next prime is 197901931. The reversal of 197901899 is 998109791.

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 197901899 - 2⁴ = 197901883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197901899.

It is not an unprimeable number, because it can be changed into a prime (197201899) 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, 6659 + ... + 20979.

It is an arithmetic number, because the mean of its divisors is an integer number (26667564).

Almost surely, 2^197901899 is an apocalyptic number.

197901899 is a deficient number, since it is larger than the sum of its proper divisors (15438613).

197901899 is a wasteful number, since it uses less digits than its factorization.

197901899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15397.

The product of its (nonzero) digits is 367416, while the sum is 53.

The square root of 197901899 is about 14067.7609803408. The cubic root of 197901899 is about 582.7513932665.

The spelling of 197901899 in words is "one hundred ninety-seven million, nine hundred one thousand, eight hundred ninety-nine".