30609661 has 4 divisors (see below), whose sum is σ = 30621024. Its totient is φ = 30598300.

The previous prime is 30609659. The next prime is 30609671. The reversal of 30609661 is 16690603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30609661 - 2¹ = 30609659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30609671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (7655256).

Almost surely, 2^30609661 is an apocalyptic number.

It is an amenable number.

30609661 is a deficient number, since it is larger than the sum of its proper divisors (11363).

30609661 is an equidigital number, since it uses as much as digits as its factorization.

30609661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30609661 is about 5532.5998409428. The cubic root of 30609661 is about 312.8139939460.

It can be divided in two parts, 3060 and 9661, that added together give a palindrome (12721).

The spelling of 30609661 in words is "thirty million, six hundred nine thousand, six hundred sixty-one".