161975153 has 2 divisors, whose sum is σ = 161975154. Its totient is φ = 161975152.

The previous prime is 161975147. The next prime is 161975161. The reversal of 161975153 is 351579161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144192064 + 17783089 = 12008^2 + 4217^2 .

It is a cyclic number.

It is not a de Polignac number, because 161975153 - 2¹⁰ = 161974129 is a prime.

It is not a weakly prime, because it can be changed into another prime (161975123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80987576 + 80987577.

It is an arithmetic number, because the mean of its divisors is an integer number (80987577).

Almost surely, 2^161975153 is an apocalyptic number.

It is an amenable number.

161975153 is a deficient number, since it is larger than the sum of its proper divisors (1).

161975153 is an equidigital number, since it uses as much as digits as its factorization.

161975153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 161975153 is about 12726.9459415839. The cubic root of 161975153 is about 545.1083060571.

The spelling of 161975153 in words is "one hundred sixty-one million, nine hundred seventy-five thousand, one hundred fifty-three".