30321793 has 2 divisors, whose sum is σ = 30321794. Its totient is φ = 30321792.

The previous prime is 30321787. The next prime is 30321817. The reversal of 30321793 is 39712303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 13082689 = 4152^2 + 3617^2 .

It is an emirp because it is prime and its reverse (39712303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30321793 is a prime.

It is a super-2 number, since 2×30321793² = 1838822261469698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30321713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160896 + 15160897.

It is an arithmetic number, because the mean of its divisors is an integer number (15160897).

Almost surely, 2^30321793 is an apocalyptic number.

It is an amenable number.

30321793 is a deficient number, since it is larger than the sum of its proper divisors (1).

30321793 is an equidigital number, since it uses as much as digits as its factorization.

30321793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 30321793 is about 5506.5227684992. The cubic root of 30321793 is about 311.8302858775.

The spelling of 30321793 in words is "thirty million, three hundred twenty-one thousand, seven hundred ninety-three".