30427987973 has 2 divisors, whose sum is σ = 30427987974. Its totient is φ = 30427987972.

The previous prime is 30427987937. The next prime is 30427987987. The reversal of 30427987973 is 37978972403.

Together with previous prime (30427987937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28405057444 + 2022930529 = 168538^2 + 44977^2 .

It is a cyclic number.

It is not a de Polignac number, because 30427987973 - 2⁸ = 30427987717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30427987573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15213993986 + 15213993987.

It is an arithmetic number, because the mean of its divisors is an integer number (15213993987).

Almost surely, 2^30427987973 is an apocalyptic number.

It is an amenable number.

30427987973 is a deficient number, since it is larger than the sum of its proper divisors (1).

30427987973 is an equidigital number, since it uses as much as digits as its factorization.

30427987973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16003008, while the sum is 59.

The spelling of 30427987973 in words is "thirty billion, four hundred twenty-seven million, nine hundred eighty-seven thousand, nine hundred seventy-three".