161140097 has 2 divisors, whose sum is σ = 161140098. Its totient is φ = 161140096.

The previous prime is 161140079. The next prime is 161140117. The reversal of 161140097 is 790041161.

Together with previous prime (161140079) 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., 117527281 + 43612816 = 10841^2 + 6604^2 .

It is a cyclic number.

It is not a de Polignac number, because 161140097 - 2⁸ = 161139841 is a prime.

It is a super-2 number, since 2×161140097² = 51932261722338818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161140027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80570048 + 80570049.

It is an arithmetic number, because the mean of its divisors is an integer number (80570049).

Almost surely, 2^161140097 is an apocalyptic number.

It is an amenable number.

161140097 is a deficient number, since it is larger than the sum of its proper divisors (1).

161140097 is an equidigital number, since it uses as much as digits as its factorization.

161140097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 161140097 is about 12694.0969351900. The cubic root of 161140097 is about 544.1699307381.

The spelling of 161140097 in words is "one hundred sixty-one million, one hundred forty thousand, ninety-seven".