2699139305 has 4 divisors (see below), whose sum is σ = 3238967172. Its totient is φ = 2159311440.

The previous prime is 2699139299. The next prime is 2699139323. The reversal of 2699139305 is 5039319962.

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 1415565376 + 1283573929 = 37624^2 + 35827^2 .

It is not a de Polignac number, because 2699139305 - 2¹² = 2699135209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2699139305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269913926 + ... + 269913935.

It is an arithmetic number, because the mean of its divisors is an integer number (809741793).

Almost surely, 2^2699139305 is an apocalyptic number.

It is an amenable number.

2699139305 is a deficient number, since it is larger than the sum of its proper divisors (539827867).

2699139305 is an equidigital number, since it uses as much as digits as its factorization.

2699139305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539827866.

The product of its (nonzero) digits is 393660, while the sum is 47.

The square root of 2699139305 is about 51953.2415254332. The cubic root of 2699139305 is about 1392.3286716809.

The spelling of 2699139305 in words is "two billion, six hundred ninety-nine million, one hundred thirty-nine thousand, three hundred five".