305208061 has 2 divisors, whose sum is σ = 305208062. Its totient is φ = 305208060.

The previous prime is 305208053. The next prime is 305208097. The reversal of 305208061 is 160802503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299082436 + 6125625 = 17294^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 305208061 - 2³ = 305208053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305208011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152604030 + 152604031.

It is an arithmetic number, because the mean of its divisors is an integer number (152604031).

Almost surely, 2^305208061 is an apocalyptic number.

It is an amenable number.

305208061 is a deficient number, since it is larger than the sum of its proper divisors (1).

305208061 is an equidigital number, since it uses as much as digits as its factorization.

305208061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 305208061 is about 17470.2049501430. The cubic root of 305208061 is about 673.2845776927.

The spelling of 305208061 in words is "three hundred five million, two hundred eight thousand, sixty-one".