161825077 has 2 divisors, whose sum is σ = 161825078. Its totient is φ = 161825076.

The previous prime is 161825029. The next prime is 161825093. The reversal of 161825077 is 770528161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154902916 + 6922161 = 12446^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 161825077 - 2¹¹ = 161823029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161825777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80912538 + 80912539.

It is an arithmetic number, because the mean of its divisors is an integer number (80912539).

Almost surely, 2^161825077 is an apocalyptic number.

It is an amenable number.

161825077 is a deficient number, since it is larger than the sum of its proper divisors (1).

161825077 is an equidigital number, since it uses as much as digits as its factorization.

161825077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 161825077 is about 12721.0485809936. The cubic root of 161825077 is about 544.9398996656.

The spelling of 161825077 in words is "one hundred sixty-one million, eight hundred twenty-five thousand, seventy-seven".