317121730 has 8 divisors (see below), whose sum is σ = 570819132. Its totient is φ = 126848688.

The previous prime is 317121659. The next prime is 317121743. The reversal of 317121730 is 37121713.

It can be written as a sum of positive squares in 2 ways, for example, as 310429161 + 6692569 = 17619^2 + 2587^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 317121695 and 317121704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15856077 + ... + 15856096.

Almost surely, 2^317121730 is an apocalyptic number.

317121730 is a deficient number, since it is larger than the sum of its proper divisors (253697402).

317121730 is a wasteful number, since it uses less digits than its factorization.

317121730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31712180.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 317121730 is about 17807.9120056227. The cubic root of 317121730 is about 681.9334607128.

The spelling of 317121730 in words is "three hundred seventeen million, one hundred twenty-one thousand, seven hundred thirty".