30102661 has 2 divisors, whose sum is σ = 30102662. Its totient is φ = 30102660.

The previous prime is 30102649. The next prime is 30102671. The reversal of 30102661 is 16620103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 3218436 = 5185^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 30102661 - 2⁵ = 30102629 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 (30102641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15051330 + 15051331.

It is an arithmetic number, because the mean of its divisors is an integer number (15051331).

Almost surely, 2^30102661 is an apocalyptic number.

It is an amenable number.

30102661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30102661 is an equidigital number, since it uses as much as digits as its factorization.

30102661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30102661 is about 5486.5891954838. The cubic root of 30102661 is about 311.0772821730.

Adding to 30102661 its reverse (16620103), we get a palindrome (46722764).

It can be divided in two parts, 3010 and 2661, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 30102661 in words is "thirty million, one hundred two thousand, six hundred sixty-one".