305749489 has 2 divisors, whose sum is σ = 305749490. Its totient is φ = 305749488.

The previous prime is 305749459. The next prime is 305749519. The reversal of 305749489 is 984947503.

It is a balanced prime because it is at equal distance from previous prime (305749459) and next prime (305749519).

It can be written as a sum of positive squares in only one way, i.e., 228010000 + 77739489 = 15100^2 + 8817^2 .

It is a cyclic number.

It is not a de Polignac number, because 305749489 - 2¹⁹ = 305225201 is a prime.

It is a super-2 number, since 2×305749489² = 186965500047522242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (305749439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152874744 + 152874745.

It is an arithmetic number, because the mean of its divisors is an integer number (152874745).

Almost surely, 2^305749489 is an apocalyptic number.

It is an amenable number.

305749489 is a deficient number, since it is larger than the sum of its proper divisors (1).

305749489 is an equidigital number, since it uses as much as digits as its factorization.

305749489 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 305749489 is about 17485.6938381066. The cubic root of 305749489 is about 673.6824699545.

The spelling of 305749489 in words is "three hundred five million, seven hundred forty-nine thousand, four hundred eighty-nine".