30718227689 has 4 divisors (see below), whose sum is σ = 30786642900. Its totient is φ = 30649812480.

The previous prime is 30718227677. The next prime is 30718227697. The reversal of 30718227689 is 98672281703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21902520025 + 8815707664 = 147995^2 + 93892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30718227689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30718227689.

It is not an unprimeable number, because it can be changed into a prime (30718227629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34206932 + ... + 34207829.

It is an arithmetic number, because the mean of its divisors is an integer number (7696660725).

Almost surely, 2^30718227689 is an apocalyptic number.

It is an amenable number.

30718227689 is a deficient number, since it is larger than the sum of its proper divisors (68415211).

30718227689 is an equidigital number, since it uses as much as digits as its factorization.

30718227689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68415210.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 30718227689 in words is "thirty billion, seven hundred eighteen million, two hundred twenty-seven thousand, six hundred eighty-nine".