30606993 has 12 divisors (see below), whose sum is σ = 44493748. Its totient is φ = 20273760.

The previous prime is 30606991. The next prime is 30607001. The reversal of 30606993 is 39960603.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 21316689 = 3048^2 + 4617^2 .

It is not a de Polignac number, because 30606993 - 2¹ = 30606991 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 (30606991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9418 + ... + 12243.

Almost surely, 2^30606993 is an apocalyptic number.

It is an amenable number.

30606993 is a deficient number, since it is larger than the sum of its proper divisors (13886755).

30606993 is a wasteful number, since it uses less digits than its factorization.

30606993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21824 (or 21821 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 30606993 is about 5532.3587193890. The cubic root of 30606993 is about 312.8049051816.

The spelling of 30606993 in words is "thirty million, six hundred six thousand, nine hundred ninety-three".