161402797 has 2 divisors, whose sum is σ = 161402798. Its totient is φ = 161402796.

The previous prime is 161402749. The next prime is 161402821. The reversal of 161402797 is 797204161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154107396 + 7295401 = 12414^2 + 2701^2 .

It is a cyclic number.

It is not a de Polignac number, because 161402797 - 2¹¹ = 161400749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161402497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80701398 + 80701399.

It is an arithmetic number, because the mean of its divisors is an integer number (80701399).

Almost surely, 2^161402797 is an apocalyptic number.

It is an amenable number.

161402797 is a deficient number, since it is larger than the sum of its proper divisors (1).

161402797 is an equidigital number, since it uses as much as digits as its factorization.

161402797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 161402797 is about 12704.4400506280. The cubic root of 161402797 is about 544.4654827248.

The spelling of 161402797 in words is "one hundred sixty-one million, four hundred two thousand, seven hundred ninety-seven".