30748079 has 4 divisors (see below), whose sum is σ = 32084976. Its totient is φ = 29411184.

The previous prime is 30748057. The next prime is 30748093. The reversal of 30748079 is 97084703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97084703 = 521 ⋅186343.

It is a cyclic number.

It is not a de Polignac number, because 30748079 - 2¹⁶ = 30682543 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 (30748009) 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, 668414 + ... + 668459.

It is an arithmetic number, because the mean of its divisors is an integer number (8021244).

Almost surely, 2^30748079 is an apocalyptic number.

30748079 is a deficient number, since it is larger than the sum of its proper divisors (1336897).

30748079 is a wasteful number, since it uses less digits than its factorization.

30748079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336896.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 30748079 is about 5545.0950397626. The cubic root of 30748079 is about 313.2848037360.

The spelling of 30748079 in words is "thirty million, seven hundred forty-eight thousand, seventy-nine".