30680261 has 2 divisors, whose sum is σ = 30680262. Its totient is φ = 30680260.

The previous prime is 30680249. The next prime is 30680263. The reversal of 30680261 is 16208603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30459361 + 220900 = 5519^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 30680261 - 2¹⁴ = 30663877 is a prime.

Together with 30680263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30680261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30680263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15340130 + 15340131.

It is an arithmetic number, because the mean of its divisors is an integer number (15340131).

Almost surely, 2^30680261 is an apocalyptic number.

It is an amenable number.

30680261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30680261 is an equidigital number, since it uses as much as digits as its factorization.

30680261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 30680261 is about 5538.9765300099. The cubic root of 30680261 is about 313.0543070784.

Adding to 30680261 its reverse (16208603), we get a palindrome (46888864).

The spelling of 30680261 in words is "thirty million, six hundred eighty thousand, two hundred sixty-one".