160881997 has 2 divisors, whose sum is σ = 160881998. Its totient is φ = 160881996.

The previous prime is 160881979. The next prime is 160882003. The reversal of 160881997 is 799188061.

Together with previous prime (160881979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123010281 + 37871716 = 11091^2 + 6154^2 .

It is a cyclic number.

It is not a de Polignac number, because 160881997 - 2¹¹ = 160879949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 160881997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160881907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80440998 + 80440999.

It is an arithmetic number, because the mean of its divisors is an integer number (80440999).

Almost surely, 2^160881997 is an apocalyptic number.

It is an amenable number.

160881997 is a deficient number, since it is larger than the sum of its proper divisors (1).

160881997 is an equidigital number, since it uses as much as digits as its factorization.

160881997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 160881997 is about 12683.9267184890. The cubic root of 160881997 is about 543.8792410102.

The spelling of 160881997 in words is "one hundred sixty million, eight hundred eighty-one thousand, nine hundred ninety-seven".