30428537 has 2 divisors, whose sum is σ = 30428538. Its totient is φ = 30428536.

The previous prime is 30428533. The next prime is 30428539. The reversal of 30428537 is 73582403.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24098281 + 6330256 = 4909^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 30428537 - 2² = 30428533 is a prime.

Together with 30428539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30428533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15214268 + 15214269.

It is an arithmetic number, because the mean of its divisors is an integer number (15214269).

Almost surely, 2^30428537 is an apocalyptic number.

It is an amenable number.

30428537 is a deficient number, since it is larger than the sum of its proper divisors (1).

30428537 is an equidigital number, since it uses as much as digits as its factorization.

30428537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 30428537 is about 5516.2067582715. The cubic root of 30428537 is about 312.1957768907.

The spelling of 30428537 in words is "thirty million, four hundred twenty-eight thousand, five hundred thirty-seven".