308442961 has 2 divisors, whose sum is σ = 308442962. Its totient is φ = 308442960.

The previous prime is 308442947. The next prime is 308442971. The reversal of 308442961 is 169244803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247118400 + 61324561 = 15720^2 + 7831^2 .

It is a cyclic number.

It is not a de Polignac number, because 308442961 - 2⁵ = 308442929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 308442961.

It is not a weakly prime, because it can be changed into another prime (308442931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154221480 + 154221481.

It is an arithmetic number, because the mean of its divisors is an integer number (154221481).

Almost surely, 2^308442961 is an apocalyptic number.

It is an amenable number.

308442961 is a deficient number, since it is larger than the sum of its proper divisors (1).

308442961 is an equidigital number, since it uses as much as digits as its factorization.

308442961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 308442961 is about 17562.5442632894. The cubic root of 308442961 is about 675.6549370721.

The spelling of 308442961 in words is "three hundred eight million, four hundred forty-two thousand, nine hundred sixty-one".