30656693 has 2 divisors, whose sum is σ = 30656694. Its totient is φ = 30656692.

The previous prime is 30656669. The next prime is 30656707. The reversal of 30656693 is 39665603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27636049 + 3020644 = 5257^2 + 1738^2 .

It is a cyclic number.

It is not a de Polignac number, because 30656693 - 2⁶ = 30656629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30656603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15328346 + 15328347.

It is an arithmetic number, because the mean of its divisors is an integer number (15328347).

Almost surely, 2^30656693 is an apocalyptic number.

It is an amenable number.

30656693 is a deficient number, since it is larger than the sum of its proper divisors (1).

30656693 is an equidigital number, since it uses as much as digits as its factorization.

30656693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 30656693 is about 5536.8486524376. The cubic root of 30656693 is about 312.9741257315.

The spelling of 30656693 in words is "thirty million, six hundred fifty-six thousand, six hundred ninety-three".