313720650 has 36 divisors (see below), whose sum is σ = 842864022. Its totient is φ = 83658720.

The previous prime is 313720577. The next prime is 313720663. The reversal of 313720650 is 56027313.

It is a happy number.

313720650 is a `hidden beast` number, since 3 + 1 + 3 + 7 + 2 + 0 + 650 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 143496441 + 170224209 = 11979^2 + 13047^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 348129 + ... + 349028.

Almost surely, 2^313720650 is an apocalyptic number.

313720650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

313720650 is an abundant number, since it is smaller than the sum of its proper divisors (529143372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313720650 is a wasteful number, since it uses less digits than its factorization.

313720650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697175 (or 697167 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 313720650 is about 17712.1610765033. The cubic root of 313720650 is about 679.4868172490.

Adding to 313720650 its reverse (56027313), we get a palindrome (369747963).

The spelling of 313720650 in words is "three hundred thirteen million, seven hundred twenty thousand, six hundred fifty".