161938867 has 2 divisors, whose sum is σ = 161938868. Its totient is φ = 161938866.

The previous prime is 161938811. The next prime is 161938873. The reversal of 161938867 is 768839161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161938867 - 2⁷ = 161938739 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161938867.

It is not a weakly prime, because it can be changed into another prime (161938877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80969433 + 80969434.

It is an arithmetic number, because the mean of its divisors is an integer number (80969434).

Almost surely, 2^161938867 is an apocalyptic number.

161938867 is a deficient number, since it is larger than the sum of its proper divisors (1).

161938867 is an equidigital number, since it uses as much as digits as its factorization.

161938867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 161938867 is about 12725.5203037047. The cubic root of 161938867 is about 545.0675975969.

The spelling of 161938867 in words is "one hundred sixty-one million, nine hundred thirty-eight thousand, eight hundred sixty-seven".