317640121 has 8 divisors (see below), whose sum is σ = 336856320. Its totient is φ = 298483008.

The previous prime is 317640101. The next prime is 317640131. The reversal of 317640121 is 121046713.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 317640121 - 2¹³ = 317631929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317640101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441 + ... + 25438.

It is an arithmetic number, because the mean of its divisors is an integer number (42107040).

Almost surely, 2^317640121 is an apocalyptic number.

It is an amenable number.

317640121 is a deficient number, since it is larger than the sum of its proper divisors (19216199).

317640121 is a wasteful number, since it uses less digits than its factorization.

317640121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29543.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 317640121 is about 17822.4611375646. The cubic root of 317640121 is about 682.3048383114.

Adding to 317640121 its reverse (121046713), we get a palindrome (438686834).

The spelling of 317640121 in words is "three hundred seventeen million, six hundred forty thousand, one hundred twenty-one".