161222693 has 2 divisors, whose sum is σ = 161222694. Its totient is φ = 161222692.

The previous prime is 161222627. The next prime is 161222741. The reversal of 161222693 is 396222161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114532804 + 46689889 = 10702^2 + 6833^2 .

It is an emirp because it is prime and its reverse (396222161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161222693 - 2¹⁸ = 160960549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161225693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80611346 + 80611347.

It is an arithmetic number, because the mean of its divisors is an integer number (80611347).

Almost surely, 2^161222693 is an apocalyptic number.

It is an amenable number.

161222693 is a deficient number, since it is larger than the sum of its proper divisors (1).

161222693 is an equidigital number, since it uses as much as digits as its factorization.

161222693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 161222693 is about 12697.3498416008. The cubic root of 161222693 is about 544.2628903908.

The spelling of 161222693 in words is "one hundred sixty-one million, two hundred twenty-two thousand, six hundred ninety-three".