161378843 has 2 divisors, whose sum is σ = 161378844. Its totient is φ = 161378842.

The previous prime is 161378821. The next prime is 161378849. The reversal of 161378843 is 348873161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161378843 - 2⁶ = 161378779 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 161378843.

It is not a weakly prime, because it can be changed into another prime (161378849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80689421 + 80689422.

It is an arithmetic number, because the mean of its divisors is an integer number (80689422).

Almost surely, 2^161378843 is an apocalyptic number.

161378843 is a deficient number, since it is larger than the sum of its proper divisors (1).

161378843 is an equidigital number, since it uses as much as digits as its factorization.

161378843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 161378843 is about 12703.4972743729. The cubic root of 161378843 is about 544.4385464476.

The spelling of 161378843 in words is "one hundred sixty-one million, three hundred seventy-eight thousand, eight hundred forty-three".