313120403 has 4 divisors (see below), whose sum is σ = 320757528. Its totient is φ = 305483280.

The previous prime is 313120397. The next prime is 313120417. The reversal of 313120403 is 304021313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 313120403 - 2⁴ = 313120387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313120463) 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, 3818501 + ... + 3818582.

It is an arithmetic number, because the mean of its divisors is an integer number (80189382).

Almost surely, 2^313120403 is an apocalyptic number.

313120403 is a deficient number, since it is larger than the sum of its proper divisors (7637125).

313120403 is an equidigital number, since it uses as much as digits as its factorization.

313120403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637124.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 313120403 is about 17695.2084757428. The cubic root of 313120403 is about 679.0531827165.

Adding to 313120403 its reverse (304021313), we get a palindrome (617141716).

The spelling of 313120403 in words is "three hundred thirteen million, one hundred twenty thousand, four hundred three".