30963993 has 4 divisors (see below), whose sum is σ = 41285328. Its totient is φ = 20642660.

The previous prime is 30963991. The next prime is 30964001. The reversal of 30963993 is 39936903.

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 30963993 - 2¹ = 30963991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30963991) 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, 5160663 + ... + 5160668.

It is an arithmetic number, because the mean of its divisors is an integer number (10321332).

Almost surely, 2^30963993 is an apocalyptic number.

It is an amenable number.

30963993 is a deficient number, since it is larger than the sum of its proper divisors (10321335).

30963993 is a wasteful number, since it uses less digits than its factorization.

30963993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321334.

The product of its (nonzero) digits is 118098, while the sum is 42.

The square root of 30963993 is about 5564.5298992817. The cubic root of 30963993 is about 314.0163926422.

The spelling of 30963993 in words is "thirty million, nine hundred sixty-three thousand, nine hundred ninety-three".