30312997873 has 2 divisors, whose sum is σ = 30312997874. Its totient is φ = 30312997872.

The previous prime is 30312997859. The next prime is 30312997907. The reversal of 30312997873 is 37879921303.

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., 29052179809 + 1260818064 = 170447^2 + 35508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312997873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30312997873.

It is not a weakly prime, because it can be changed into another prime (30312097873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156498936 + 15156498937.

It is an arithmetic number, because the mean of its divisors is an integer number (15156498937).

Almost surely, 2^30312997873 is an apocalyptic number.

It is an amenable number.

30312997873 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312997873 is an equidigital number, since it uses as much as digits as its factorization.

30312997873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The spelling of 30312997873 in words is "thirty billion, three hundred twelve million, nine hundred ninety-seven thousand, eight hundred seventy-three".