30693993 has 16 divisors (see below), whose sum is σ = 47272896. Its totient is φ = 17507840.

The previous prime is 30693967. The next prime is 30694007. The reversal of 30693993 is 39939603.

It is a cyclic number.

It is not a de Polignac number, because 30693993 - 2⁸ = 30693737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30692993) 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 15 ways as a sum of consecutive naturals, for example, 26796 + ... + 27917.

It is an arithmetic number, because the mean of its divisors is an integer number (2954556).

Almost surely, 2^30693993 is an apocalyptic number.

30693993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30693993 is a deficient number, since it is larger than the sum of its proper divisors (16578903).

30693993 is a wasteful number, since it uses less digits than its factorization.

30693993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54744.

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

The square root of 30693993 is about 5540.2159705196. The cubic root of 30693993 is about 313.1010061654.

The spelling of 30693993 in words is "thirty million, six hundred ninety-three thousand, nine hundred ninety-three".