161506097 has 2 divisors, whose sum is σ = 161506098. Its totient is φ = 161506096.

The previous prime is 161506091. The next prime is 161506109. The reversal of 161506097 is 790605161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93624976 + 67881121 = 9676^2 + 8239^2 .

It is an emirp because it is prime and its reverse (790605161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161506097 is a prime.

It is not a weakly prime, because it can be changed into another prime (161506091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80753048 + 80753049.

It is an arithmetic number, because the mean of its divisors is an integer number (80753049).

Almost surely, 2^161506097 is an apocalyptic number.

It is an amenable number.

161506097 is a deficient number, since it is larger than the sum of its proper divisors (1).

161506097 is an equidigital number, since it uses as much as digits as its factorization.

161506097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 161506097 is about 12708.5049081314. The cubic root of 161506097 is about 544.5816130745.

The spelling of 161506097 in words is "one hundred sixty-one million, five hundred six thousand, ninety-seven".