161489087 has 2 divisors, whose sum is σ = 161489088. Its totient is φ = 161489086.

The previous prime is 161489057. The next prime is 161489129. The reversal of 161489087 is 780984161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161489087 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 (161489017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80744543 + 80744544.

It is an arithmetic number, because the mean of its divisors is an integer number (80744544).

Almost surely, 2^161489087 is an apocalyptic number.

161489087 is a deficient number, since it is larger than the sum of its proper divisors (1).

161489087 is an equidigital number, since it uses as much as digits as its factorization.

161489087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 161489087 is about 12707.8356536430. The cubic root of 161489087 is about 544.5624937582.

The spelling of 161489087 in words is "one hundred sixty-one million, four hundred eighty-nine thousand, eighty-seven".