197059813 has 2 divisors, whose sum is σ = 197059814. Its totient is φ = 197059812.

The previous prime is 197059799. The next prime is 197059831. The reversal of 197059813 is 318950791.

Together with next prime (197059831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176836804 + 20223009 = 13298^2 + 4497^2 .

It is a cyclic number.

It is not a de Polignac number, because 197059813 - 2⁹ = 197059301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197059813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197056813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98529906 + 98529907.

It is an arithmetic number, because the mean of its divisors is an integer number (98529907).

Almost surely, 2^197059813 is an apocalyptic number.

It is an amenable number.

197059813 is a deficient number, since it is larger than the sum of its proper divisors (1).

197059813 is an equidigital number, since it uses as much as digits as its factorization.

197059813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 197059813 is about 14037.7994358090. The cubic root of 197059813 is about 581.9236692485.

The spelling of 197059813 in words is "one hundred ninety-seven million, fifty-nine thousand, eight hundred thirteen".