197039081 has 2 divisors, whose sum is σ = 197039082. Its totient is φ = 197039080.

The previous prime is 197039057. The next prime is 197039099. The reversal of 197039081 is 180930791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190992400 + 6046681 = 13820^2 + 2459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197039081 is a prime.

It is a super-2 number, since 2×197039081² = 77648798882649122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197039581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98519540 + 98519541.

It is an arithmetic number, because the mean of its divisors is an integer number (98519541).

Almost surely, 2^197039081 is an apocalyptic number.

It is an amenable number.

197039081 is a deficient number, since it is larger than the sum of its proper divisors (1).

197039081 is an equidigital number, since it uses as much as digits as its factorization.

197039081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 197039081 is about 14037.0609815588. The cubic root of 197039081 is about 581.9032611223.

The spelling of 197039081 in words is "one hundred ninety-seven million, thirty-nine thousand, eighty-one".