30013661 has 4 divisors (see below), whose sum is σ = 30076800. Its totient is φ = 29950524.

The previous prime is 30013657. The next prime is 30013663. The reversal of 30013661 is 16631003.

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 an emirpimes, since its reverse is a distinct semiprime: 16631003 = 193 ⋅86171.

It is a cyclic number.

It is not a de Polignac number, because 30013661 - 2² = 30013657 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 (30013663) 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, 30851 + ... + 31808.

It is an arithmetic number, because the mean of its divisors is an integer number (7519200).

Almost surely, 2^30013661 is an apocalyptic number.

It is an amenable number.

30013661 is a deficient number, since it is larger than the sum of its proper divisors (63139).

30013661 is an equidigital number, since it uses as much as digits as its factorization.

30013661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63138.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 30013661 is about 5478.4725060915. The cubic root of 30013661 is about 310.7704077751.

Adding to 30013661 its reverse (16631003), we get a palindrome (46644664).

The spelling of 30013661 in words is "thirty million, thirteen thousand, six hundred sixty-one".