311029139 has 4 divisors (see below), whose sum is σ = 312177120. Its totient is φ = 309881160.

The previous prime is 311029111. The next prime is 311029151. The reversal of 311029139 is 931920113.

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

It is a cyclic number.

It is not a de Polignac number, because 311029139 - 2¹⁶ = 310963603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311029109) 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, 573584 + ... + 574125.

It is an arithmetic number, because the mean of its divisors is an integer number (78044280).

Almost surely, 2^311029139 is an apocalyptic number.

311029139 is a deficient number, since it is larger than the sum of its proper divisors (1147981).

311029139 is a wasteful number, since it uses less digits than its factorization.

311029139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147980.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 311029139 is about 17636.0182297479. The cubic root of 311029139 is about 677.5380544430.

The spelling of 311029139 in words is "three hundred eleven million, twenty-nine thousand, one hundred thirty-nine".