31334689 has 4 divisors (see below), whose sum is σ = 33177924. Its totient is φ = 29491456.

The previous prime is 31334687. The next prime is 31334729. The reversal of 31334689 is 98643313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98643313 = 127 ⋅776719.

It can be written as a sum of positive squares in 2 ways, for example, as 12194064 + 19140625 = 3492^2 + 4375^2 .

It is a cyclic number.

It is not a de Polignac number, because 31334689 - 2¹ = 31334687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31334683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921592 + ... + 921625.

It is an arithmetic number, because the mean of its divisors is an integer number (8294481).

Almost surely, 2^31334689 is an apocalyptic number.

It is an amenable number.

31334689 is a deficient number, since it is larger than the sum of its proper divisors (1843235).

31334689 is a wasteful number, since it uses less digits than its factorization.

31334689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843234.

The product of its digits is 46656, while the sum is 37.

The square root of 31334689 is about 5597.7396331019. The cubic root of 31334689 is about 315.2645430336.

It can be divided in two parts, 31334 and 689, that added together give a palindrome (32023).

The spelling of 31334689 in words is "thirty-one million, three hundred thirty-four thousand, six hundred eighty-nine".