317840401 has 4 divisors (see below), whose sum is σ = 317916900. Its totient is φ = 317763904.

The previous prime is 317840389. The next prime is 317840407. The reversal of 317840401 is 104048713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104048713 = 233 ⋅446561.

It can be written as a sum of positive squares in 2 ways, for example, as 123210000 + 194630401 = 11100^2 + 13951^2 .

It is a cyclic number.

It is not a de Polignac number, because 317840401 - 2²¹ = 315743249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 317840401.

It is not an unprimeable number, because it can be changed into a prime (317840407) 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, 31636 + ... + 40453.

It is an arithmetic number, because the mean of its divisors is an integer number (79479225).

Almost surely, 2^317840401 is an apocalyptic number.

It is an amenable number.

317840401 is a deficient number, since it is larger than the sum of its proper divisors (76499).

317840401 is an equidigital number, since it uses as much as digits as its factorization.

317840401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76498.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 317840401 is about 17828.0790047610. The cubic root of 317840401 is about 682.4482115748.

The spelling of 317840401 in words is "three hundred seventeen million, eight hundred forty thousand, four hundred one".