306861013 has 4 divisors (see below), whose sum is σ = 306947628. Its totient is φ = 306774400.

The previous prime is 306860993. The next prime is 306861031. The reversal of 306861013 is 310168603.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94809169 + 212051844 = 9737^2 + 14562^2 .

It is a cyclic number.

It is not a de Polignac number, because 306861013 - 2²¹ = 304763861 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 (306861613) 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, 37756 + ... + 45157.

It is an arithmetic number, because the mean of its divisors is an integer number (76736907).

Almost surely, 2^306861013 is an apocalyptic number.

It is an amenable number.

306861013 is a deficient number, since it is larger than the sum of its proper divisors (86615).

306861013 is an equidigital number, since it uses as much as digits as its factorization.

306861013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86614.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 306861013 is about 17517.4488153955. The cubic root of 306861013 is about 674.4978527804.

The spelling of 306861013 in words is "three hundred six million, eight hundred sixty-one thousand, thirteen".