197487938 has 18 divisors (see below), whose sum is σ = 313242579. Its totient is φ = 93368052.

The previous prime is 197487931. The next prime is 197487943. The reversal of 197487938 is 839784791.

197487938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 98743969 + 98743969 = 9937^2 + 9937^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9937.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197487931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 377345 + ... + 377867.

Almost surely, 2^197487938 is an apocalyptic number.

197487938 is a deficient number, since it is larger than the sum of its proper divisors (115754641).

197487938 is an frugal number, since it uses more digits than its factorization.

197487938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 544 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 197487938 is about 14053.0401693014. The cubic root of 197487938 is about 582.3447865110.

The spelling of 197487938 in words is "one hundred ninety-seven million, four hundred eighty-seven thousand, nine hundred thirty-eight".