313601721 has 8 divisors (see below), whose sum is σ = 418282560. Its totient is φ = 208994352.

The previous prime is 313601693. The next prime is 313601747. The reversal of 313601721 is 127106313.

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

It is not a de Polignac number, because 313601721 - 2⁶ = 313601657 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 313601691 and 313601700.

It is not an unprimeable number, because it can be changed into a prime (313601521) 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, 7485 + ... + 26138.

It is an arithmetic number, because the mean of its divisors is an integer number (52285320).

Almost surely, 2^313601721 is an apocalyptic number.

It is an amenable number.

313601721 is a deficient number, since it is larger than the sum of its proper divisors (104680839).

313601721 is a wasteful number, since it uses less digits than its factorization.

313601721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36735.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 313601721 is about 17708.8034886607. The cubic root of 313601721 is about 679.4009437164.

The spelling of 313601721 in words is "three hundred thirteen million, six hundred one thousand, seven hundred twenty-one".