197900117 has 2 divisors, whose sum is σ = 197900118. Its totient is φ = 197900116.

The previous prime is 197900113. The next prime is 197900141. The reversal of 197900117 is 711009791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165739876 + 32160241 = 12874^2 + 5671^2 .

It is a cyclic number.

It is not a de Polignac number, because 197900117 - 2² = 197900113 is a prime.

It is a super-2 number, since 2×197900117² = 78328912617227378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197900113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98950058 + 98950059.

It is an arithmetic number, because the mean of its divisors is an integer number (98950059).

Almost surely, 2^197900117 is an apocalyptic number.

It is an amenable number.

197900117 is a deficient number, since it is larger than the sum of its proper divisors (1).

197900117 is an equidigital number, since it uses as much as digits as its factorization.

197900117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 197900117 is about 14067.6976438933. The cubic root of 197900117 is about 582.7496441405.

The spelling of 197900117 in words is "one hundred ninety-seven million, nine hundred thousand, one hundred seventeen".