30993247 has 8 divisors (see below), whose sum is σ = 31363920. Its totient is φ = 30624960.

The previous prime is 30993139. The next prime is 30993251. The reversal of 30993247 is 74239903.

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 30993247 - 2²³ = 22604639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30993947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40347 + ... + 41107.

It is an arithmetic number, because the mean of its divisors is an integer number (3920490).

Almost surely, 2^30993247 is an apocalyptic number.

30993247 is a deficient number, since it is larger than the sum of its proper divisors (370673).

30993247 is a wasteful number, since it uses less digits than its factorization.

30993247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 30993247 is about 5567.1578924978. The cubic root of 30993247 is about 314.1152531057.

The spelling of 30993247 in words is "thirty million, nine hundred ninety-three thousand, two hundred forty-seven".