161886349 has 2 divisors, whose sum is σ = 161886350. Its totient is φ = 161886348.

The previous prime is 161886341. The next prime is 161886367. The reversal of 161886349 is 943688161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 79530724 = 9075^2 + 8918^2 .

It is a cyclic number.

It is not a de Polignac number, because 161886349 - 2³ = 161886341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161886299 and 161886308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161886341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80943174 + 80943175.

It is an arithmetic number, because the mean of its divisors is an integer number (80943175).

Almost surely, 2^161886349 is an apocalyptic number.

It is an amenable number.

161886349 is a deficient number, since it is larger than the sum of its proper divisors (1).

161886349 is an equidigital number, since it uses as much as digits as its factorization.

161886349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 161886349 is about 12723.4566451102. The cubic root of 161886349 is about 545.0086680438.

The spelling of 161886349 in words is "one hundred sixty-one million, eight hundred eighty-six thousand, three hundred forty-nine".