197108939 has 2 divisors, whose sum is σ = 197108940. Its totient is φ = 197108938.

The previous prime is 197108927. The next prime is 197108959. The reversal of 197108939 is 939801791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197108939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197108893 and 197108902.

It is not a weakly prime, because it can be changed into another prime (197108959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98554469 + 98554470.

It is an arithmetic number, because the mean of its divisors is an integer number (98554470).

Almost surely, 2^197108939 is an apocalyptic number.

197108939 is a deficient number, since it is larger than the sum of its proper divisors (1).

197108939 is an equidigital number, since it uses as much as digits as its factorization.

197108939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 197108939 is about 14039.5491024463. The cubic root of 197108939 is about 581.9720220920.

The spelling of 197108939 in words is "one hundred ninety-seven million, one hundred eight thousand, nine hundred thirty-nine".