141605809 has 2 divisors, whose sum is σ = 141605810. Its totient is φ = 141605808.

The previous prime is 141605777. The next prime is 141605839. The reversal of 141605809 is 908506141.

141605809 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 can be written as a sum of positive squares in only one way, i.e., 140351409 + 1254400 = 11847^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 141605809 - 2⁵ = 141605777 is a prime.

It is not a weakly prime, because it can be changed into another prime (141605839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70802904 + 70802905.

It is an arithmetic number, because the mean of its divisors is an integer number (70802905).

Almost surely, 2^141605809 is an apocalyptic number.

It is an amenable number.

141605809 is a deficient number, since it is larger than the sum of its proper divisors (1).

141605809 is an equidigital number, since it uses as much as digits as its factorization.

141605809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 141605809 is about 11899.8239062601. The cubic root of 141605809 is about 521.2271424819.

The spelling of 141605809 in words is "one hundred forty-one million, six hundred five thousand, eight hundred nine".