30748979 has 2 divisors, whose sum is σ = 30748980. Its totient is φ = 30748978.

The previous prime is 30748967. The next prime is 30748997. The reversal of 30748979 is 97984703.

Together with next prime (30748997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30748979 - 2²⁰ = 29700403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30748919) 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 as a sum of consecutive naturals, namely, 15374489 + 15374490.

It is an arithmetic number, because the mean of its divisors is an integer number (15374490).

Almost surely, 2^30748979 is an apocalyptic number.

30748979 is a deficient number, since it is larger than the sum of its proper divisors (1).

30748979 is an equidigital number, since it uses as much as digits as its factorization.

30748979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 30748979 is about 5545.1761919708. The cubic root of 30748979 is about 313.2878603342.

The spelling of 30748979 in words is "thirty million, seven hundred forty-eight thousand, nine hundred seventy-nine".