30690641 has 2 divisors, whose sum is σ = 30690642. Its totient is φ = 30690640.

The previous prime is 30690637. The next prime is 30690659. The reversal of 30690641 is 14609603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30195025 + 495616 = 5495^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 30690641 - 2² = 30690637 is a prime.

It is not a weakly prime, because it can be changed into another prime (30690041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15345320 + 15345321.

It is an arithmetic number, because the mean of its divisors is an integer number (15345321).

Almost surely, 2^30690641 is an apocalyptic number.

It is an amenable number.

30690641 is a deficient number, since it is larger than the sum of its proper divisors (1).

30690641 is an equidigital number, since it uses as much as digits as its factorization.

30690641 is an evil number, because the sum of its binary digits is even.

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

The square root of 30690641 is about 5539.9134469773. The cubic root of 30690641 is about 313.0896081395.

The spelling of 30690641 in words is "thirty million, six hundred ninety thousand, six hundred forty-one".