230728979749 has 2 divisors, whose sum is σ = 230728979750. Its totient is φ = 230728979748.

The previous prime is 230728979743. The next prime is 230728979771. The reversal of 230728979749 is 947979827032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119590089124 + 111138890625 = 345818^2 + 333375^2 .

It is a cyclic number.

It is not a de Polignac number, because 230728979749 - 2⁵ = 230728979717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230728979743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115364489874 + 115364489875.

It is an arithmetic number, because the mean of its divisors is an integer number (115364489875).

Almost surely, 2^230728979749 is an apocalyptic number.

It is an amenable number.

230728979749 is a deficient number, since it is larger than the sum of its proper divisors (1).

230728979749 is an equidigital number, since it uses as much as digits as its factorization.

230728979749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96018048, while the sum is 67.

The spelling of 230728979749 in words is "two hundred thirty billion, seven hundred twenty-eight million, nine hundred seventy-nine thousand, seven hundred forty-nine".