30940661 has 2 divisors, whose sum is σ = 30940662. Its totient is φ = 30940660.

The previous prime is 30940639. The next prime is 30940703. The reversal of 30940661 is 16604903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 5880625 = 5006^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 30940661 - 2⁶ = 30940597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30940601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15470330 + 15470331.

It is an arithmetic number, because the mean of its divisors is an integer number (15470331).

Almost surely, 2^30940661 is an apocalyptic number.

It is an amenable number.

30940661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30940661 is an equidigital number, since it uses as much as digits as its factorization.

30940661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30940661 is about 5562.4330108326. The cubic root of 30940661 is about 313.9375002386.

The spelling of 30940661 in words is "thirty million, nine hundred forty thousand, six hundred sixty-one".