161385797 has 2 divisors, whose sum is σ = 161385798. Its totient is φ = 161385796.

The previous prime is 161385761. The next prime is 161385821. The reversal of 161385797 is 797583161.

161385797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136445761 + 24940036 = 11681^2 + 4994^2 .

It is an emirp because it is prime and its reverse (797583161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161385797 - 2⁸ = 161385541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161385197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80692898 + 80692899.

It is an arithmetic number, because the mean of its divisors is an integer number (80692899).

Almost surely, 2^161385797 is an apocalyptic number.

It is an amenable number.

161385797 is a deficient number, since it is larger than the sum of its proper divisors (1).

161385797 is an equidigital number, since it uses as much as digits as its factorization.

161385797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 161385797 is about 12703.7709755804. The cubic root of 161385797 is about 544.4463664964.

The spelling of 161385797 in words is "one hundred sixty-one million, three hundred eighty-five thousand, seven hundred ninety-seven".