30945399 has 4 divisors (see below), whose sum is σ = 41260536. Its totient is φ = 20630264.

The previous prime is 30945391. The next prime is 30945401. The reversal of 30945399 is 99354903.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30945399 - 2³ = 30945391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30945399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30945391) 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, 5157564 + ... + 5157569.

It is an arithmetic number, because the mean of its divisors is an integer number (10315134).

Almost surely, 2^30945399 is an apocalyptic number.

30945399 is a deficient number, since it is larger than the sum of its proper divisors (10315137).

30945399 is a wasteful number, since it uses less digits than its factorization.

30945399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10315136.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 30945399 is about 5562.8588872989. The cubic root of 30945399 is about 313.9535240286.

The spelling of 30945399 in words is "thirty million, nine hundred forty-five thousand, three hundred ninety-nine".