161825693 has 2 divisors, whose sum is σ = 161825694. Its totient is φ = 161825692.

The previous prime is 161825687. The next prime is 161825773. The reversal of 161825693 is 396528161.

161825693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160706329 + 1119364 = 12677^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 161825693 - 2²⁰ = 160777117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161825693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161825093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80912846 + 80912847.

It is an arithmetic number, because the mean of its divisors is an integer number (80912847).

Almost surely, 2^161825693 is an apocalyptic number.

It is an amenable number.

161825693 is a deficient number, since it is larger than the sum of its proper divisors (1).

161825693 is an equidigital number, since it uses as much as digits as its factorization.

161825693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 161825693 is about 12721.0727928111. The cubic root of 161825693 is about 544.9405911170.

The spelling of 161825693 in words is "one hundred sixty-one million, eight hundred twenty-five thousand, six hundred ninety-three".