12971783 has 4 divisors (see below), whose sum is σ = 14151048. Its totient is φ = 11792520.

The previous prime is 12971743. The next prime is 12971797. The reversal of 12971783 is 38717921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38717921 = 11 ⋅3519811.

It is a cyclic number.

It is not a de Polignac number, because 12971783 - 2¹⁰ = 12970759 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 (12971743) 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, 589616 + ... + 589637.

It is an arithmetic number, because the mean of its divisors is an integer number (3537762).

Almost surely, 2^12971783 is an apocalyptic number.

12971783 is a deficient number, since it is larger than the sum of its proper divisors (1179265).

12971783 is a wasteful number, since it uses less digits than its factorization.

12971783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179264.

The product of its digits is 21168, while the sum is 38.

The square root of 12971783 is about 3601.6361559713. The cubic root of 12971783 is about 234.9632234587.

The spelling of 12971783 in words is "twelve million, nine hundred seventy-one thousand, seven hundred eighty-three".