161187853 has 2 divisors, whose sum is σ = 161187854. Its totient is φ = 161187852.

The previous prime is 161187839. The next prime is 161187877. The reversal of 161187853 is 358781161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148888804 + 12299049 = 12202^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 161187853 - 2¹⁷ = 161056781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161187053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80593926 + 80593927.

It is an arithmetic number, because the mean of its divisors is an integer number (80593927).

Almost surely, 2^161187853 is an apocalyptic number.

It is an amenable number.

161187853 is a deficient number, since it is larger than the sum of its proper divisors (1).

161187853 is an equidigital number, since it uses as much as digits as its factorization.

161187853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 40.

The square root of 161187853 is about 12695.9778276429. The cubic root of 161187853 is about 544.2236827483.

The spelling of 161187853 in words is "one hundred sixty-one million, one hundred eighty-seven thousand, eight hundred fifty-three".