204161539 has 2 divisors, whose sum is σ = 204161540. Its totient is φ = 204161538.

The previous prime is 204161473. The next prime is 204161543. The reversal of 204161539 is 935161402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204161539 - 2⁷ = 204161411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204161539.

It is not a weakly prime, because it can be changed into another prime (204161569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102080769 + 102080770.

It is an arithmetic number, because the mean of its divisors is an integer number (102080770).

Almost surely, 2^204161539 is an apocalyptic number.

204161539 is a deficient number, since it is larger than the sum of its proper divisors (1).

204161539 is an equidigital number, since it uses as much as digits as its factorization.

204161539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 204161539 is about 14288.5107341528. The cubic root of 204161539 is about 588.8318734023.

The spelling of 204161539 in words is "two hundred four million, one hundred sixty-one thousand, five hundred thirty-nine".