30793021387 has 2 divisors, whose sum is σ = 30793021388. Its totient is φ = 30793021386.

The previous prime is 30793021381. The next prime is 30793021409. The reversal of 30793021387 is 78312039703.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30793021387 is a prime.

It is a super-2 number, since 2×30793021387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30793021381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15396510693 + 15396510694.

It is an arithmetic number, because the mean of its divisors is an integer number (15396510694).

Almost surely, 2^30793021387 is an apocalyptic number.

30793021387 is a deficient number, since it is larger than the sum of its proper divisors (1).

30793021387 is an equidigital number, since it uses as much as digits as its factorization.

30793021387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 30793021387 in words is "thirty billion, seven hundred ninety-three million, twenty-one thousand, three hundred eighty-seven".