30528917 has 2 divisors, whose sum is σ = 30528918. Its totient is φ = 30528916.

The previous prime is 30528913. The next prime is 30528929. The reversal of 30528917 is 71982503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 7623121 = 4786^2 + 2761^2 .

It is a cyclic number.

It is not a de Polignac number, because 30528917 - 2² = 30528913 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30528913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15264458 + 15264459.

It is an arithmetic number, because the mean of its divisors is an integer number (15264459).

Almost surely, 2^30528917 is an apocalyptic number.

It is an amenable number.

30528917 is a deficient number, since it is larger than the sum of its proper divisors (1).

30528917 is an equidigital number, since it uses as much as digits as its factorization.

30528917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 30528917 is about 5525.2979105203. The cubic root of 30528917 is about 312.5386985675.

The spelling of 30528917 in words is "thirty million, five hundred twenty-eight thousand, nine hundred seventeen".