161406593 has 2 divisors, whose sum is σ = 161406594. Its totient is φ = 161406592.

The previous prime is 161406587. The next prime is 161406629. The reversal of 161406593 is 395604161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157051024 + 4355569 = 12532^2 + 2087^2 .

It is a cyclic number.

It is not a de Polignac number, because 161406593 - 2⁶ = 161406529 is a prime.

It is not a weakly prime, because it can be changed into another prime (161406293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80703296 + 80703297.

It is an arithmetic number, because the mean of its divisors is an integer number (80703297).

Almost surely, 2^161406593 is an apocalyptic number.

It is an amenable number.

161406593 is a deficient number, since it is larger than the sum of its proper divisors (1).

161406593 is an equidigital number, since it uses as much as digits as its factorization.

161406593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 161406593 is about 12704.5894463379. The cubic root of 161406593 is about 544.4697510828.

The spelling of 161406593 in words is "one hundred sixty-one million, four hundred six thousand, five hundred ninety-three".