161050861 has 2 divisors, whose sum is σ = 161050862. Its totient is φ = 161050860.

The previous prime is 161050837. The next prime is 161050873. The reversal of 161050861 is 168050161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145202500 + 15848361 = 12050^2 + 3981^2 .

It is a cyclic number.

It is not a de Polignac number, because 161050861 - 2⁹ = 161050349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161050261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80525430 + 80525431.

It is an arithmetic number, because the mean of its divisors is an integer number (80525431).

Almost surely, 2^161050861 is an apocalyptic number.

It is an amenable number.

161050861 is a deficient number, since it is larger than the sum of its proper divisors (1).

161050861 is an equidigital number, since it uses as much as digits as its factorization.

161050861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 161050861 is about 12690.5815863577. The cubic root of 161050861 is about 544.0694622320.

The spelling of 161050861 in words is "one hundred sixty-one million, fifty thousand, eight hundred sixty-one".