12793657 has 4 divisors (see below), whose sum is σ = 12911140. Its totient is φ = 12676176.

The previous prime is 12793609. The next prime is 12793663. The reversal of 12793657 is 75639721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75639721 = 31 ⋅2439991.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 4562496 = 2869^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 12793657 - 2¹⁵ = 12760889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12793687) 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, 58578 + ... + 58795.

It is an arithmetic number, because the mean of its divisors is an integer number (3227785).

Almost surely, 2^12793657 is an apocalyptic number.

It is an amenable number.

12793657 is a deficient number, since it is larger than the sum of its proper divisors (117483).

12793657 is a wasteful number, since it uses less digits than its factorization.

12793657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117482.

The product of its digits is 79380, while the sum is 40.

The square root of 12793657 is about 3576.8221929528. The cubic root of 12793657 is about 233.8827729966.

The spelling of 12793657 in words is "twelve million, seven hundred ninety-three thousand, six hundred fifty-seven".