197639049 has 8 divisors (see below), whose sum is σ = 264275200. Its totient is φ = 131381136.

The previous prime is 197639041. The next prime is 197639063. The reversal of 197639049 is 940936791.

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

It is not a de Polignac number, because 197639049 - 2³ = 197639041 is a prime.

It is a super-2 number, since 2×197639049² = 78122387379248802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 197638989 and 197639007.

It is not an unprimeable number, because it can be changed into a prime (197639041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93337 + ... + 95430.

It is an arithmetic number, because the mean of its divisors is an integer number (33034400).

Almost surely, 2^197639049 is an apocalyptic number.

It is an amenable number.

197639049 is a deficient number, since it is larger than the sum of its proper divisors (66636151).

197639049 is a wasteful number, since it uses less digits than its factorization.

197639049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189119.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 197639049 is about 14058.4155935155. The cubic root of 197639049 is about 582.4932787328.

The spelling of 197639049 in words is "one hundred ninety-seven million, six hundred thirty-nine thousand, forty-nine".