161395037 has 2 divisors, whose sum is σ = 161395038. Its totient is φ = 161395036.

The previous prime is 161395019. The next prime is 161395057. The reversal of 161395037 is 730593161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160300921 + 1094116 = 12661^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 161395037 - 2⁶ = 161394973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161394988 and 161395006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161395057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80697518 + 80697519.

It is an arithmetic number, because the mean of its divisors is an integer number (80697519).

Almost surely, 2^161395037 is an apocalyptic number.

It is an amenable number.

161395037 is a deficient number, since it is larger than the sum of its proper divisors (1).

161395037 is an equidigital number, since it uses as much as digits as its factorization.

161395037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 161395037 is about 12704.1346419187. The cubic root of 161395037 is about 544.4567568953.

The spelling of 161395037 in words is "one hundred sixty-one million, three hundred ninety-five thousand, thirty-seven".