13031047 has 4 divisors (see below), whose sum is σ = 13146480. Its totient is φ = 12915616.

The previous prime is 13031033. The next prime is 13031099. The reversal of 13031047 is 74013031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74013031 = 223 ⋅331897.

It is a cyclic number.

It is not a de Polignac number, because 13031047 - 2¹⁹ = 12506759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331047) 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, 57547 + ... + 57772.

It is an arithmetic number, because the mean of its divisors is an integer number (3286620).

Almost surely, 2^13031047 is an apocalyptic number.

13031047 is a deficient number, since it is larger than the sum of its proper divisors (115433).

13031047 is a wasteful number, since it uses less digits than its factorization.

13031047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115432.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 13031047 is about 3609.8541521785. The cubic root of 13031047 is about 235.3205042847.

Adding to 13031047 its reverse (74013031), we get a palindrome (87044078).

The spelling of 13031047 in words is "thirteen million, thirty-one thousand, forty-seven".