31234123 has 4 divisors (see below), whose sum is σ = 31247608. Its totient is φ = 31220640.

The previous prime is 31234109. The next prime is 31234141. The reversal of 31234123 is 32143213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32143213 = 23 ⋅1397531.

It is a cyclic number.

It is not a de Polignac number, because 31234123 - 2²¹ = 29136971 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 31234123.

It is not an unprimeable number, because it can be changed into a prime (31234183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286 + ... + 8227.

It is an arithmetic number, because the mean of its divisors is an integer number (7811902).

Almost surely, 2^31234123 is an apocalyptic number.

31234123 is a deficient number, since it is larger than the sum of its proper divisors (13485).

31234123 is a wasteful number, since it uses less digits than its factorization.

31234123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484.

The product of its digits is 432, while the sum is 19.

The square root of 31234123 is about 5588.7496812793. The cubic root of 31234123 is about 314.9269100599.

Adding to 31234123 its reverse (32143213), we get a palindrome (63377336).

The spelling of 31234123 in words is "thirty-one million, two hundred thirty-four thousand, one hundred twenty-three".