30930903893 has 2 divisors, whose sum is σ = 30930903894. Its totient is φ = 30930903892.

The previous prime is 30930903889. The next prime is 30930903959. The reversal of 30930903893 is 39830903903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20033005444 + 10897898449 = 141538^2 + 104393^2 .

It is a cyclic number.

It is not a de Polignac number, because 30930903893 - 2² = 30930903889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30930903823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15465451946 + 15465451947.

It is an arithmetic number, because the mean of its divisors is an integer number (15465451947).

Almost surely, 2^30930903893 is an apocalyptic number.

It is an amenable number.

30930903893 is a deficient number, since it is larger than the sum of its proper divisors (1).

30930903893 is an equidigital number, since it uses as much as digits as its factorization.

30930903893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 47.

The spelling of 30930903893 in words is "thirty billion, nine hundred thirty million, nine hundred three thousand, eight hundred ninety-three".