305680477 has 2 divisors, whose sum is σ = 305680478. Its totient is φ = 305680476.

The previous prime is 305680457. The next prime is 305680523. The reversal of 305680477 is 774086503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304642116 + 1038361 = 17454^2 + 1019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305680477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305680457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152840238 + 152840239.

It is an arithmetic number, because the mean of its divisors is an integer number (152840239).

Almost surely, 2^305680477 is an apocalyptic number.

It is an amenable number.

305680477 is a deficient number, since it is larger than the sum of its proper divisors (1).

305680477 is an equidigital number, since it uses as much as digits as its factorization.

305680477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 305680477 is about 17483.7203420782. The cubic root of 305680477 is about 673.6317795749.

The spelling of 305680477 in words is "three hundred five million, six hundred eighty thousand, four hundred seventy-seven".