197907709793 has 2 divisors, whose sum is σ = 197907709794. Its totient is φ = 197907709792.

The previous prime is 197907709789. The next prime is 197907709799. The reversal of 197907709793 is 397907709791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163060900864 + 34846808929 = 403808^2 + 186673^2 .

It is an emirp because it is prime and its reverse (397907709791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197907709793 - 2² = 197907709789 is a prime.

It is not a weakly prime, because it can be changed into another prime (197907709799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98953854896 + 98953854897.

It is an arithmetic number, because the mean of its divisors is an integer number (98953854897).

Almost surely, 2^197907709793 is an apocalyptic number.

It is an amenable number.

197907709793 is a deficient number, since it is larger than the sum of its proper divisors (1).

197907709793 is an equidigital number, since it uses as much as digits as its factorization.

197907709793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47258883, while the sum is 68.

The spelling of 197907709793 in words is "one hundred ninety-seven billion, nine hundred seven million, seven hundred nine thousand, seven hundred ninety-three".