197989937 has 8 divisors (see below), whose sum is σ = 208658400. Its totient is φ = 187346304.

The previous prime is 197989921. The next prime is 197989949. The reversal of 197989937 is 739989791.

It is a happy number.

197989937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 197989937 - 2⁴ = 197989921 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 197989937.

It is not an unprimeable number, because it can be changed into a prime (197985937) 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, 11489 + ... + 22977.

It is an arithmetic number, because the mean of its divisors is an integer number (26082300).

Almost surely, 2^197989937 is an apocalyptic number.

197989937 is the 11489-th pentagonal number.

It is an amenable number.

197989937 is a deficient number, since it is larger than the sum of its proper divisors (10668463).

197989937 is a wasteful number, since it uses less digits than its factorization.

197989937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12415.

The product of its digits is 7715736, while the sum is 62.

The square root of 197989937 is about 14070.8897017921. The cubic root of 197989937 is about 582.8377940904.

The spelling of 197989937 in words is "one hundred ninety-seven million, nine hundred eighty-nine thousand, nine hundred thirty-seven".