30690637 has 2 divisors, whose sum is σ = 30690638. Its totient is φ = 30690636.

The previous prime is 30690629. The next prime is 30690641. The reversal of 30690637 is 73609603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30096196 + 594441 = 5486^2 + 771^2 .

It is an emirp because it is prime and its reverse (73609603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30690637 - 2³ = 30690629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30690617) 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, 15345318 + 15345319.

It is an arithmetic number, because the mean of its divisors is an integer number (15345319).

Almost surely, 2^30690637 is an apocalyptic number.

It is an amenable number.

30690637 is a deficient number, since it is larger than the sum of its proper divisors (1).

30690637 is an equidigital number, since it uses as much as digits as its factorization.

30690637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 30690637 is about 5539.9130859608. The cubic root of 30690637 is about 313.0895945376.

The spelling of 30690637 in words is "thirty million, six hundred ninety thousand, six hundred thirty-seven".