30712399 has 4 divisors (see below), whose sum is σ = 31145040. Its totient is φ = 30279760.

The previous prime is 30712397. The next prime is 30712433. The reversal of 30712399 is 99321703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99321703 = 13 ⋅7640131.

It is a cyclic number.

It is not a de Polignac number, because 30712399 - 2¹ = 30712397 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 (30712393) 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, 216214 + ... + 216355.

It is an arithmetic number, because the mean of its divisors is an integer number (7786260).

Almost surely, 2^30712399 is an apocalyptic number.

30712399 is a deficient number, since it is larger than the sum of its proper divisors (432641).

30712399 is an equidigital number, since it uses as much as digits as its factorization.

30712399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432640.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 30712399 is about 5541.8768481445. The cubic root of 30712399 is about 313.1635785127.

The spelling of 30712399 in words is "thirty million, seven hundred twelve thousand, three hundred ninety-nine".