161306069 has 2 divisors, whose sum is σ = 161306070. Its totient is φ = 161306068.

The previous prime is 161306063. The next prime is 161306087. The reversal of 161306069 is 960603161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 50951044 = 10505^2 + 7138^2 .

It is a cyclic number.

It is not a de Polignac number, because 161306069 - 2¹⁶ = 161240533 is a prime.

It is a super-2 number, since 2×161306069² = 52039295792465522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161306063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80653034 + 80653035.

It is an arithmetic number, because the mean of its divisors is an integer number (80653035).

Almost surely, 2^161306069 is an apocalyptic number.

It is an amenable number.

161306069 is a deficient number, since it is larger than the sum of its proper divisors (1).

161306069 is an equidigital number, since it uses as much as digits as its factorization.

161306069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 161306069 is about 12700.6326220390. The cubic root of 161306069 is about 544.3566957183.

The spelling of 161306069 in words is "one hundred sixty-one million, three hundred six thousand, sixty-nine".