30871961 has 8 divisors (see below), whose sum is σ = 31458240. Its totient is φ = 30291408.

The previous prime is 30871937. The next prime is 30871993. The reversal of 30871961 is 16917803.

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

It is a cyclic number.

It is not a de Polignac number, because 30871961 - 2²² = 26677657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30871901) 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 7 ways as a sum of consecutive naturals, for example, 10340 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (3932280).

Almost surely, 2^30871961 is an apocalyptic number.

It is an amenable number.

30871961 is a deficient number, since it is larger than the sum of its proper divisors (586279).

30871961 is a wasteful number, since it uses less digits than its factorization.

30871961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 30871961 is about 5556.2542238454. The cubic root of 30871961 is about 313.7049746238.

The spelling of 30871961 in words is "thirty million, eight hundred seventy-one thousand, nine hundred sixty-one".