30723047009 has 2 divisors, whose sum is σ = 30723047010. Its totient is φ = 30723047008.

The previous prime is 30723046993. The next prime is 30723047057. The reversal of 30723047009 is 90074032703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26212581409 + 4510465600 = 161903^2 + 67160^2 .

It is a cyclic number.

It is not a de Polignac number, because 30723047009 - 2⁴ = 30723046993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30723047009.

It is not a weakly prime, because it can be changed into another prime (30723047059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15361523504 + 15361523505.

It is an arithmetic number, because the mean of its divisors is an integer number (15361523505).

Almost surely, 2^30723047009 is an apocalyptic number.

It is an amenable number.

30723047009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30723047009 is an equidigital number, since it uses as much as digits as its factorization.

30723047009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 35.

The spelling of 30723047009 in words is "thirty billion, seven hundred twenty-three million, forty-seven thousand, nine".