197885938 has 4 divisors (see below), whose sum is σ = 296828910. Its totient is φ = 98942968.

The previous prime is 197885923. The next prime is 197885971. The reversal of 197885938 is 839588791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 839588791 = 3517 ⋅238723.

It can be written as a sum of positive squares in only one way, i.e., 177608929 + 20277009 = 13327^2 + 4503^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49471483 + ... + 49471486.

Almost surely, 2^197885938 is an apocalyptic number.

197885938 is a deficient number, since it is larger than the sum of its proper divisors (98942972).

197885938 is an equidigital number, since it uses as much as digits as its factorization.

197885938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98942971.

The product of its digits is 4354560, while the sum is 58.

The square root of 197885938 is about 14067.1936789112. The cubic root of 197885938 is about 582.7357263374.

The spelling of 197885938 in words is "one hundred ninety-seven million, eight hundred eighty-five thousand, nine hundred thirty-eight".