1305238169 has 2 divisors, whose sum is σ = 1305238170. Its totient is φ = 1305238168.

The previous prime is 1305238153. The next prime is 1305238171. The reversal of 1305238169 is 9618325031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252239769 + 52998400 = 35387^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305238169 - 2⁴ = 1305238153 is a prime.

It is a super-2 number, since 2×1305238169² = 3407293355628945122, which contains 22 as substring.

Together with 1305238171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1305238139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652619084 + 652619085.

It is an arithmetic number, because the mean of its divisors is an integer number (652619085).

Almost surely, 2^1305238169 is an apocalyptic number.

It is an amenable number.

1305238169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305238169 is an equidigital number, since it uses as much as digits as its factorization.

1305238169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1305238169 is about 36128.0800624666. The cubic root of 1305238169 is about 1092.8567905033.

The spelling of 1305238169 in words is "one billion, three hundred five million, two hundred thirty-eight thousand, one hundred sixty-nine".