30645073 has 2 divisors, whose sum is σ = 30645074. Its totient is φ = 30645072.

The previous prime is 30645071. The next prime is 30645079. The reversal of 30645073 is 37054603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30547729 + 97344 = 5527^2 + 312^2 .

It is a cyclic number.

It is not a de Polignac number, because 30645073 - 2¹ = 30645071 is a prime.

Together with 30645071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30645071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322536 + 15322537.

It is an arithmetic number, because the mean of its divisors is an integer number (15322537).

Almost surely, 2^30645073 is an apocalyptic number.

It is an amenable number.

30645073 is a deficient number, since it is larger than the sum of its proper divisors (1).

30645073 is an equidigital number, since it uses as much as digits as its factorization.

30645073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 30645073 is about 5535.7992196249. The cubic root of 30645073 is about 312.9345778811.

Adding to 30645073 its reverse (37054603), we get a palindrome (67699676).

The spelling of 30645073 in words is "thirty million, six hundred forty-five thousand, seventy-three".