30203997 has 4 divisors (see below), whose sum is σ = 40272000. Its totient is φ = 20135996.

The previous prime is 30203989. The next prime is 30204059. The reversal of 30203997 is 79930203.

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: 79930203 = 3 ⋅26643401.

It is a cyclic number.

It is not a de Polignac number, because 30203997 - 2³ = 30203989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203197) 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 3 ways as a sum of consecutive naturals, for example, 5033997 + ... + 5034002.

It is an arithmetic number, because the mean of its divisors is an integer number (10068000).

Almost surely, 2^30203997 is an apocalyptic number.

It is an amenable number.

30203997 is a deficient number, since it is larger than the sum of its proper divisors (10068003).

30203997 is a wasteful number, since it uses less digits than its factorization.

30203997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068002.

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 30203997 is about 5495.8163178913. The cubic root of 30203997 is about 311.4259558960.

The spelling of 30203997 in words is "thirty million, two hundred three thousand, nine hundred ninety-seven".