161960387 has 2 divisors, whose sum is σ = 161960388. Its totient is φ = 161960386.

The previous prime is 161960371. The next prime is 161960401. The reversal of 161960387 is 783069161.

161960387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161960387 - 2⁴ = 161960371 is a prime.

It is not a weakly prime, because it can be changed into another prime (161960087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80980193 + 80980194.

It is an arithmetic number, because the mean of its divisors is an integer number (80980194).

Almost surely, 2^161960387 is an apocalyptic number.

161960387 is a deficient number, since it is larger than the sum of its proper divisors (1).

161960387 is an equidigital number, since it uses as much as digits as its factorization.

161960387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 161960387 is about 12726.3658206104. The cubic root of 161960387 is about 545.0917411423.

The spelling of 161960387 in words is "one hundred sixty-one million, nine hundred sixty thousand, three hundred eighty-seven".