197137907 has 2 divisors, whose sum is σ = 197137908. Its totient is φ = 197137906.

The previous prime is 197137903. The next prime is 197137949. The reversal of 197137907 is 709731791.

It is a happy number.

197137907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197137907 - 2² = 197137903 is a prime.

It is not a weakly prime, because it can be changed into another prime (197137903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98568953 + 98568954.

It is an arithmetic number, because the mean of its divisors is an integer number (98568954).

Almost surely, 2^197137907 is an apocalyptic number.

197137907 is a deficient number, since it is larger than the sum of its proper divisors (1).

197137907 is an equidigital number, since it uses as much as digits as its factorization.

197137907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 83349, while the sum is 44.

The square root of 197137907 is about 14040.5807216083. The cubic root of 197137907 is about 582.0005304215. Note that the first 3 decimals are identical.

The spelling of 197137907 in words is "one hundred ninety-seven million, one hundred thirty-seven thousand, nine hundred seven".