30906613 has 2 divisors, whose sum is σ = 30906614. Its totient is φ = 30906612.

The previous prime is 30906599. The next prime is 30906643. The reversal of 30906613 is 31660903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 237169 = 5538^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 30906613 - 2²¹ = 28809461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30906643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15453306 + 15453307.

It is an arithmetic number, because the mean of its divisors is an integer number (15453307).

Almost surely, 2^30906613 is an apocalyptic number.

It is an amenable number.

30906613 is a deficient number, since it is larger than the sum of its proper divisors (1).

30906613 is an equidigital number, since it uses as much as digits as its factorization.

30906613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 30906613 is about 5559.3716371547. The cubic root of 30906613 is about 313.8223026651.

The spelling of 30906613 in words is "thirty million, nine hundred six thousand, six hundred thirteen".