30507661 has 4 divisors (see below), whose sum is σ = 31024800. Its totient is φ = 29990524.

The previous prime is 30507643. The next prime is 30507677. The reversal of 30507661 is 16670503.

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.

It is a cyclic number.

It is not a de Polignac number, because 30507661 - 2⁵ = 30507629 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 (30507611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258481 + ... + 258598.

It is an arithmetic number, because the mean of its divisors is an integer number (7756200).

Almost surely, 2^30507661 is an apocalyptic number.

It is an amenable number.

30507661 is a deficient number, since it is larger than the sum of its proper divisors (517139).

30507661 is an equidigital number, since it uses as much as digits as its factorization.

30507661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517138.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 30507661 is about 5523.3740593952. The cubic root of 30507661 is about 312.4661458793.

The spelling of 30507661 in words is "thirty million, five hundred seven thousand, six hundred sixty-one".