30470399 has 4 divisors (see below), whose sum is σ = 30481440. Its totient is φ = 30459360.

The previous prime is 30470393. The next prime is 30470449. The reversal of 30470399 is 99307403.

It is a Cunningham number, because it is equal to 5520²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99307403 = 13 ⋅7639031.

It is a cyclic number.

It is not a de Polignac number, because 30470399 - 2⁴ = 30470383 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 (30470393) 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, 2759 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (7620360).

Almost surely, 2^30470399 is an apocalyptic number.

30470399 is a deficient number, since it is larger than the sum of its proper divisors (11041).

30470399 is an equidigital number, since it uses as much as digits as its factorization.

30470399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30470399 is about 5519.9999094203. Note that the first 4 decimals coincide. The cubic root of 30470399 is about 312.3388788622.

The spelling of 30470399 in words is "thirty million, four hundred seventy thousand, three hundred ninety-nine".