3131404123 has 4 divisors (see below), whose sum is σ = 3136615048. Its totient is φ = 3126193200.

The previous prime is 3131404099. The next prime is 3131404127. The reversal of 3131404123 is 3214041313.

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 3131404123 - 2¹⁷ = 3131273051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131404094 and 3131404103.

It is not an unprimeable number, because it can be changed into a prime (3131404127) 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, 2604561 + ... + 2605762.

It is an arithmetic number, because the mean of its divisors is an integer number (784153762).

Almost surely, 2^3131404123 is an apocalyptic number.

3131404123 is a deficient number, since it is larger than the sum of its proper divisors (5210925).

3131404123 is an equidigital number, since it uses as much as digits as its factorization.

3131404123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210924.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3131404123 is about 55958.9503386188. The cubic root of 3131404123 is about 1463.0068953517.

Adding to 3131404123 its reverse (3214041313), we get a palindrome (6345445436).

The spelling of 3131404123 in words is "three billion, one hundred thirty-one million, four hundred four thousand, one hundred twenty-three".