30720099 has 4 divisors (see below), whose sum is σ = 40960136. Its totient is φ = 20480064.

The previous prime is 30720097. The next prime is 30720119. The reversal of 30720099 is 99002703.

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

It is not a de Polignac number, because 30720099 - 2¹ = 30720097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30720097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120014 + ... + 5120019.

It is an arithmetic number, because the mean of its divisors is an integer number (10240034).

Almost surely, 2^30720099 is an apocalyptic number.

30720099 is a deficient number, since it is larger than the sum of its proper divisors (10240037).

30720099 is a wasteful number, since it uses less digits than its factorization.

30720099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240036.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 30720099 is about 5542.5715151002. The cubic root of 30720099 is about 313.1897477271.

The spelling of 30720099 in words is "thirty million, seven hundred twenty thousand, ninety-nine".