30105689 has 4 divisors (see below), whose sum is σ = 31414656. Its totient is φ = 28796724.

The previous prime is 30105653. The next prime is 30105707. The reversal of 30105689 is 98650103.

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 30105689 - 2¹² = 30101593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30105389) 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, 654449 + ... + 654494.

It is an arithmetic number, because the mean of its divisors is an integer number (7853664).

Almost surely, 2^30105689 is an apocalyptic number.

It is an amenable number.

30105689 is a deficient number, since it is larger than the sum of its proper divisors (1308967).

30105689 is a wasteful number, since it uses less digits than its factorization.

30105689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308966.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 30105689 is about 5486.8651341180. The cubic root of 30105689 is about 311.0877121527.

The spelling of 30105689 in words is "thirty million, one hundred five thousand, six hundred eighty-nine".