161049101 has 2 divisors, whose sum is σ = 161049102. Its totient is φ = 161049100.

The previous prime is 161049029. The next prime is 161049103. The reversal of 161049101 is 101940161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 139876 = 12685^2 + 374^2 .

It is an emirp because it is prime and its reverse (101940161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161049101 - 2¹⁴ = 161032717 is a prime.

Together with 161049103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161049103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80524550 + 80524551.

It is an arithmetic number, because the mean of its divisors is an integer number (80524551).

Almost surely, 2^161049101 is an apocalyptic number.

It is an amenable number.

161049101 is a deficient number, since it is larger than the sum of its proper divisors (1).

161049101 is an equidigital number, since it uses as much as digits as its factorization.

161049101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 161049101 is about 12690.5122434045. The cubic root of 161049101 is about 544.0674803203.

Adding to 161049101 its reverse (101940161), we get a palindrome (262989262).

The spelling of 161049101 in words is "one hundred sixty-one million, forty-nine thousand, one hundred one".