30001961 has 4 divisors (see below), whose sum is σ = 32729424. Its totient is φ = 27274500.

The previous prime is 30001919. The next prime is 30001981. The reversal of 30001961 is 16910003.

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 de Polignac number, because none of the positive numbers 2^k-30001961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30001901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363715 + ... + 1363736.

It is an arithmetic number, because the mean of its divisors is an integer number (8182356).

Almost surely, 2^30001961 is an apocalyptic number.

It is an amenable number.

30001961 is a deficient number, since it is larger than the sum of its proper divisors (2727463).

30001961 is a wasteful number, since it uses less digits than its factorization.

30001961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727462.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 30001961 is about 5477.4045861156. The cubic root of 30001961 is about 310.7300207623.

Adding to 30001961 its reverse (16910003), we get a palindrome (46911964).

The spelling of 30001961 in words is "thirty million, one thousand, nine hundred sixty-one".