311344409 has 4 divisors (see below), whose sum is σ = 329658804. Its totient is φ = 293030016.

The previous prime is 311344379. The next prime is 311344417. The reversal of 311344409 is 904443113.

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 222457225 + 88887184 = 14915^2 + 9428^2 .

It is a cyclic number.

It is not a de Polignac number, because 311344409 - 2¹⁶ = 311278873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311334409) 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, 9157172 + ... + 9157205.

It is an arithmetic number, because the mean of its divisors is an integer number (82414701).

Almost surely, 2^311344409 is an apocalyptic number.

It is an amenable number.

311344409 is a deficient number, since it is larger than the sum of its proper divisors (18314395).

311344409 is a wasteful number, since it uses less digits than its factorization.

311344409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18314394.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 311344409 is about 17644.9542079315. The cubic root of 311344409 is about 677.7669025508.

The spelling of 311344409 in words is "three hundred eleven million, three hundred forty-four thousand, four hundred nine".