230921787779 has 2 divisors, whose sum is σ = 230921787780. Its totient is φ = 230921787778.

The previous prime is 230921787727. The next prime is 230921787787. The reversal of 230921787779 is 977787129032.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230921787779 - 2²⁴ = 230905010563 is a prime.

It is not a weakly prime, because it can be changed into another prime (230921787379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115460893889 + 115460893890.

It is an arithmetic number, because the mean of its divisors is an integer number (115460893890).

Almost surely, 2^230921787779 is an apocalyptic number.

230921787779 is a deficient number, since it is larger than the sum of its proper divisors (1).

230921787779 is an equidigital number, since it uses as much as digits as its factorization.

230921787779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18670176, while the sum is 62.

The spelling of 230921787779 in words is "two hundred thirty billion, nine hundred twenty-one million, seven hundred eighty-seven thousand, seven hundred seventy-nine".