308980013 has 4 divisors (see below), whose sum is σ = 310079868. Its totient is φ = 307880160.

The previous prime is 308979997. The next prime is 308980031. The reversal of 308980013 is 310089803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310089803 = 53 ⋅5850751.

It can be written as a sum of positive squares in 2 ways, for example, as 270997444 + 37982569 = 16462^2 + 6163^2 .

It is a cyclic number.

It is not a de Polignac number, because 308980013 - 2⁴ = 308979997 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 (308980043) 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, 549506 + ... + 550067.

It is an arithmetic number, because the mean of its divisors is an integer number (77519967).

Almost surely, 2^308980013 is an apocalyptic number.

It is an amenable number.

308980013 is a deficient number, since it is larger than the sum of its proper divisors (1099855).

308980013 is a wasteful number, since it uses less digits than its factorization.

308980013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099854.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 308980013 is about 17577.8273117015. The cubic root of 308980013 is about 676.0468533344.

The spelling of 308980013 in words is "three hundred eight million, nine hundred eighty thousand, thirteen".