30646261 has 2 divisors, whose sum is σ = 30646262. Its totient is φ = 30646260.

The previous prime is 30646247. The next prime is 30646267. The reversal of 30646261 is 16264603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 12744900 = 4231^2 + 3570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30646261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30646267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15323130 + 15323131.

It is an arithmetic number, because the mean of its divisors is an integer number (15323131).

Almost surely, 2^30646261 is an apocalyptic number.

It is an amenable number.

30646261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30646261 is an equidigital number, since it uses as much as digits as its factorization.

30646261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 30646261 is about 5535.9065201645. The cubic root of 30646261 is about 312.9386216141.

The spelling of 30646261 in words is "thirty million, six hundred forty-six thousand, two hundred sixty-one".