30540661 has 2 divisors, whose sum is σ = 30540662. Its totient is φ = 30540660.

The previous prime is 30540649. The next prime is 30540703. The reversal of 30540661 is 16604503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28153636 + 2387025 = 5306^2 + 1545^2 .

It is an emirp because it is prime and its reverse (16604503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30540661 - 2⁷ = 30540533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30540361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15270330 + 15270331.

It is an arithmetic number, because the mean of its divisors is an integer number (15270331).

Almost surely, 2^30540661 is an apocalyptic number.

It is an amenable number.

30540661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30540661 is an equidigital number, since it uses as much as digits as its factorization.

30540661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30540661 is about 5526.3605564603. The cubic root of 30540661 is about 312.5787696901.

The spelling of 30540661 in words is "thirty million, five hundred forty thousand, six hundred sixty-one".