131217607 has 4 divisors (see below), whose sum is σ = 131246896. Its totient is φ = 131188320.

The previous prime is 131217601. The next prime is 131217661. The reversal of 131217607 is 706712131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706712131 = 557 ⋅1268783.

It is a cyclic number.

It is not a de Polignac number, because 131217607 - 2⁷ = 131217479 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 (131217601) 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, 6363 + ... + 17404.

It is an arithmetic number, because the mean of its divisors is an integer number (32811724).

Almost surely, 2^131217607 is an apocalyptic number.

131217607 is a deficient number, since it is larger than the sum of its proper divisors (29289).

131217607 is an equidigital number, since it uses as much as digits as its factorization.

131217607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29288.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 131217607 is about 11455.0254037257. The cubic root of 131217607 is about 508.1563665520.

Adding to 131217607 its reverse (706712131), we get a palindrome (837929738).

The spelling of 131217607 in words is "one hundred thirty-one million, two hundred seventeen thousand, six hundred seven".