30471557393 has 2 divisors, whose sum is σ = 30471557394. Its totient is φ = 30471557392.

The previous prime is 30471557357. The next prime is 30471557407. The reversal of 30471557393 is 39375517403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21259972864 + 9211584529 = 145808^2 + 95977^2 .

It is an emirp because it is prime and its reverse (39375517403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30471557393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30471557093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15235778696 + 15235778697.

It is an arithmetic number, because the mean of its divisors is an integer number (15235778697).

Almost surely, 2^30471557393 is an apocalyptic number.

It is an amenable number.

30471557393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30471557393 is an equidigital number, since it uses as much as digits as its factorization.

30471557393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1190700, while the sum is 47.

The spelling of 30471557393 in words is "thirty billion, four hundred seventy-one million, five hundred fifty-seven thousand, three hundred ninety-three".