161432389 has 2 divisors, whose sum is σ = 161432390. Its totient is φ = 161432388.

The previous prime is 161432351. The next prime is 161432431. The reversal of 161432389 is 983234161.

161432389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 56881764 = 10225^2 + 7542^2 .

It is a cyclic number.

It is not a de Polignac number, because 161432389 - 2¹⁵ = 161399621 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161432309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80716194 + 80716195.

It is an arithmetic number, because the mean of its divisors is an integer number (80716195).

Almost surely, 2^161432389 is an apocalyptic number.

It is an amenable number.

161432389 is a deficient number, since it is larger than the sum of its proper divisors (1).

161432389 is an equidigital number, since it uses as much as digits as its factorization.

161432389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 161432389 is about 12705.6046294539. The cubic root of 161432389 is about 544.4987552543.

The spelling of 161432389 in words is "one hundred sixty-one million, four hundred thirty-two thousand, three hundred eighty-nine".