161168437 has 2 divisors, whose sum is σ = 161168438. Its totient is φ = 161168436.

The previous prime is 161168419. The next prime is 161168467. The reversal of 161168437 is 734861161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132503121 + 28665316 = 11511^2 + 5354^2 .

It is an emirp because it is prime and its reverse (734861161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161168437 - 2²⁷ = 26950709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161168396 and 161168405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161168407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80584218 + 80584219.

It is an arithmetic number, because the mean of its divisors is an integer number (80584219).

Almost surely, 2^161168437 is an apocalyptic number.

It is an amenable number.

161168437 is a deficient number, since it is larger than the sum of its proper divisors (1).

161168437 is an equidigital number, since it uses as much as digits as its factorization.

161168437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 161168437 is about 12695.2131529959. The cubic root of 161168437 is about 544.2018302510.

The spelling of 161168437 in words is "one hundred sixty-one million, one hundred sixty-eight thousand, four hundred thirty-seven".