161950871 has 2 divisors, whose sum is σ = 161950872. Its totient is φ = 161950870.

The previous prime is 161950853. The next prime is 161950937. The reversal of 161950871 is 178059161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161950871 - 2⁶ = 161950807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161950801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80975435 + 80975436.

It is an arithmetic number, because the mean of its divisors is an integer number (80975436).

Almost surely, 2^161950871 is an apocalyptic number.

161950871 is a deficient number, since it is larger than the sum of its proper divisors (1).

161950871 is an equidigital number, since it uses as much as digits as its factorization.

161950871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 161950871 is about 12725.9919456206. The cubic root of 161950871 is about 545.0810652918.

The spelling of 161950871 in words is "one hundred sixty-one million, nine hundred fifty thousand, eight hundred seventy-one".