310138769 has 4 divisors (see below), whose sum is σ = 328382244. Its totient is φ = 291895296.

The previous prime is 310138727. The next prime is 310138793. The reversal of 310138769 is 967831013.

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 254083600 + 56055169 = 15940^2 + 7487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-310138769 is a prime.

It is a super-2 number, since 2×310138769² = 192372112073670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (310138709) 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, 9121712 + ... + 9121745.

It is an arithmetic number, because the mean of its divisors is an integer number (82095561).

Almost surely, 2^310138769 is an apocalyptic number.

It is an amenable number.

310138769 is a deficient number, since it is larger than the sum of its proper divisors (18243475).

310138769 is a wasteful number, since it uses less digits than its factorization.

310138769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18243474.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 310138769 is about 17610.7571955325. The cubic root of 310138769 is about 676.8909166662.

The spelling of 310138769 in words is "three hundred ten million, one hundred thirty-eight thousand, seven hundred sixty-nine".