197899049 has 8 divisors (see below), whose sum is σ = 199202568. Its totient is φ = 196600320.

The previous prime is 197899043. The next prime is 197899069. The reversal of 197899049 is 940998791.

It can be written as a sum of positive squares in 4 ways, for example, as 4494400 + 193404649 = 2120^2 + 13907^2 .

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 197899049 - 2⁴ = 197899033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197898985 and 197899003.

It is not an unprimeable number, because it can be changed into a prime (197899043) 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, 115769 + ... + 117465.

It is an arithmetic number, because the mean of its divisors is an integer number (24900321).

Almost surely, 2^197899049 is an apocalyptic number.

It is an amenable number.

197899049 is a deficient number, since it is larger than the sum of its proper divisors (1303519).

197899049 is a wasteful number, since it uses less digits than its factorization.

197899049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 197899049 is about 14067.6596845389. The cubic root of 197899049 is about 582.7485958377.

The spelling of 197899049 in words is "one hundred ninety-seven million, eight hundred ninety-nine thousand, forty-nine".