161490853 has 2 divisors, whose sum is σ = 161490854. Its totient is φ = 161490852.

The previous prime is 161490827. The next prime is 161490877. The reversal of 161490853 is 358094161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131262849 + 30228004 = 11457^2 + 5498^2 .

It is an emirp because it is prime and its reverse (358094161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161490853 - 2¹³ = 161482661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161460853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80745426 + 80745427.

It is an arithmetic number, because the mean of its divisors is an integer number (80745427).

Almost surely, 2^161490853 is an apocalyptic number.

It is an amenable number.

161490853 is a deficient number, since it is larger than the sum of its proper divisors (1).

161490853 is an equidigital number, since it uses as much as digits as its factorization.

161490853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 161490853 is about 12707.9051381414. The cubic root of 161490853 is about 544.5644788126.

The spelling of 161490853 in words is "one hundred sixty-one million, four hundred ninety thousand, eight hundred fifty-three".