30690993 has 24 divisors (see below), whose sum is σ = 43479072. Its totient is φ = 19252288.

The previous prime is 30690983. The next prime is 30690997. The reversal of 30690993 is 39909603.

It is not a de Polignac number, because 30690993 - 2¹² = 30686897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30690997) 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 23 ways as a sum of consecutive naturals, for example, 131605 + ... + 131837.

It is an arithmetic number, because the mean of its divisors is an integer number (1811628).

Almost surely, 2^30690993 is an apocalyptic number.

It is an amenable number.

30690993 is a deficient number, since it is larger than the sum of its proper divisors (12788079).

30690993 is a wasteful number, since it uses less digits than its factorization.

30690993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 30690993 is about 5539.9452163356. The cubic root of 30690993 is about 313.0908051073.

The spelling of 30690993 in words is "thirty million, six hundred ninety thousand, nine hundred ninety-three".