161060591 has 2 divisors, whose sum is σ = 161060592. Its totient is φ = 161060590.

The previous prime is 161060561. The next prime is 161060597. The reversal of 161060591 is 195060161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161060591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161060597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80530295 + 80530296.

It is an arithmetic number, because the mean of its divisors is an integer number (80530296).

Almost surely, 2^161060591 is an apocalyptic number.

161060591 is a deficient number, since it is larger than the sum of its proper divisors (1).

161060591 is an equidigital number, since it uses as much as digits as its factorization.

161060591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 161060591 is about 12690.9649357328. The cubic root of 161060591 is about 544.0804187899.

The spelling of 161060591 in words is "one hundred sixty-one million, sixty thousand, five hundred ninety-one".