30814993 has 4 divisors (see below), whose sum is σ = 33616368. Its totient is φ = 28013620.

The previous prime is 30814981. The next prime is 30814997. The reversal of 30814993 is 39941803.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39941803 = 11 ⋅3631073.

It is a cyclic number.

It is not a de Polignac number, because 30814993 - 2⁹ = 30814481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30814997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400671 + ... + 1400692.

It is an arithmetic number, because the mean of its divisors is an integer number (8404092).

Almost surely, 2^30814993 is an apocalyptic number.

It is an amenable number.

30814993 is a deficient number, since it is larger than the sum of its proper divisors (2801375).

30814993 is a wasteful number, since it uses less digits than its factorization.

30814993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801374.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 30814993 is about 5551.1253813979. The cubic root of 30814993 is about 313.5118959829.

The spelling of 30814993 in words is "thirty million, eight hundred fourteen thousand, nine hundred ninety-three".