197063681 has 2 divisors, whose sum is σ = 197063682. Its totient is φ = 197063680.

The previous prime is 197063651. The next prime is 197063723. The reversal of 197063681 is 186360791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112699456 + 84364225 = 10616^2 + 9185^2 .

It is an emirp because it is prime and its reverse (186360791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197063681 - 2²² = 192869377 is a prime.

It is a super-2 number, since 2×197063681² = 77668188738539522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197063641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98531840 + 98531841.

It is an arithmetic number, because the mean of its divisors is an integer number (98531841).

Almost surely, 2^197063681 is an apocalyptic number.

It is an amenable number.

197063681 is a deficient number, since it is larger than the sum of its proper divisors (1).

197063681 is an equidigital number, since it uses as much as digits as its factorization.

197063681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 197063681 is about 14037.9372060143. The cubic root of 197063681 is about 581.9274766644.

The spelling of 197063681 in words is "one hundred ninety-seven million, sixty-three thousand, six hundred eighty-one".