30121617 has 8 divisors (see below), whose sum is σ = 40820800. Its totient is φ = 19751760.

The previous prime is 30121607. The next prime is 30121621. The reversal of 30121617 is 71612103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30121617 - 2⁸ = 30121361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121593 and 30121602.

It is not an unprimeable number, because it can be changed into a prime (30121607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82117 + ... + 82482.

It is an arithmetic number, because the mean of its divisors is an integer number (5102600).

Almost surely, 2^30121617 is an apocalyptic number.

It is an amenable number.

30121617 is a deficient number, since it is larger than the sum of its proper divisors (10699183).

30121617 is a wasteful number, since it uses less digits than its factorization.

30121617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164663.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 30121617 is about 5488.3164085173. The cubic root of 30121617 is about 311.1425648140.

The spelling of 30121617 in words is "thirty million, one hundred twenty-one thousand, six hundred seventeen".