305213477 has 2 divisors, whose sum is σ = 305213478. Its totient is φ = 305213476.

The previous prime is 305213449. The next prime is 305213501. The reversal of 305213477 is 774312503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245831041 + 59382436 = 15679^2 + 7706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305213477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305216477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152606738 + 152606739.

It is an arithmetic number, because the mean of its divisors is an integer number (152606739).

Almost surely, 2^305213477 is an apocalyptic number.

It is an amenable number.

305213477 is a deficient number, since it is larger than the sum of its proper divisors (1).

305213477 is an equidigital number, since it uses as much as digits as its factorization.

305213477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 305213477 is about 17470.3599562230. The cubic root of 305213477 is about 673.2885602084.

The spelling of 305213477 in words is "three hundred five million, two hundred thirteen thousand, four hundred seventy-seven".