308945479 has 2 divisors, whose sum is σ = 308945480. Its totient is φ = 308945478.

The previous prime is 308945477. The next prime is 308945489. The reversal of 308945479 is 974549803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 308945479 - 2¹ = 308945477 is a prime.

Together with 308945477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308945477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154472739 + 154472740.

It is an arithmetic number, because the mean of its divisors is an integer number (154472740).

Almost surely, 2^308945479 is an apocalyptic number.

308945479 is a deficient number, since it is larger than the sum of its proper divisors (1).

308945479 is an equidigital number, since it uses as much as digits as its factorization.

308945479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 308945479 is about 17576.8449671720. The cubic root of 308945479 is about 676.0216656513.

The spelling of 308945479 in words is "three hundred eight million, nine hundred forty-five thousand, four hundred seventy-nine".