308136401 has 2 divisors, whose sum is σ = 308136402. Its totient is φ = 308136400.

The previous prime is 308136331. The next prime is 308136403. The reversal of 308136401 is 104631803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223054225 + 85082176 = 14935^2 + 9224^2 .

It is a cyclic number.

It is not a de Polignac number, because 308136401 - 2¹⁸ = 307874257 is a prime.

It is a Sophie Germain prime.

Together with 308136403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (308136403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154068200 + 154068201.

It is an arithmetic number, because the mean of its divisors is an integer number (154068201).

Almost surely, 2^308136401 is an apocalyptic number.

It is an amenable number.

308136401 is a deficient number, since it is larger than the sum of its proper divisors (1).

308136401 is an equidigital number, since it uses as much as digits as its factorization.

308136401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 308136401 is about 17553.8144287787. The cubic root of 308136401 is about 675.4310194567.

The spelling of 308136401 in words is "three hundred eight million, one hundred thirty-six thousand, four hundred one".