306879249 has 4 divisors (see below), whose sum is σ = 409172336. Its totient is φ = 204586164.

The previous prime is 306879193. The next prime is 306879269. The reversal of 306879249 is 942978603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 306879249 - 2¹³ = 306871057 is a prime.

It is a super-3 number, since 3×306879249³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 306879198 and 306879207.

It is not an unprimeable number, because it can be changed into a prime (306879269) 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, 51146539 + ... + 51146544.

It is an arithmetic number, because the mean of its divisors is an integer number (102293084).

Almost surely, 2^306879249 is an apocalyptic number.

It is an amenable number.

306879249 is a deficient number, since it is larger than the sum of its proper divisors (102293087).

306879249 is a wasteful number, since it uses less digits than its factorization.

306879249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102293086.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 306879249 is about 17517.9693172468. The cubic root of 306879249 is about 674.5112137686.

The spelling of 306879249 in words is "three hundred six million, eight hundred seventy-nine thousand, two hundred forty-nine".