30121619 has 12 divisors (see below), whose sum is σ = 33417048. Its totient is φ = 27128640.

The previous prime is 30121607. The next prime is 30121621. The reversal of 30121619 is 91612103.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-30121619 is a prime.

It is a super-2 number, since 2×30121619² = 1814623862362322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121594 and 30121603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12572 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (2784754).

Almost surely, 2^30121619 is an apocalyptic number.

30121619 is a deficient number, since it is larger than the sum of its proper divisors (3295429).

30121619 is a wasteful number, since it uses less digits than its factorization.

30121619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 30121619 is about 5488.3165907225. The cubic root of 30121619 is about 311.1425717004.

The spelling of 30121619 in words is "thirty million, one hundred twenty-one thousand, six hundred nineteen".