313333649 has 4 divisors (see below), whose sum is σ = 321802164. Its totient is φ = 304865136.

The previous prime is 313333633. The next prime is 313333651. The reversal of 313333649 is 946333313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946333313 = 109 ⋅8681957.

It can be written as a sum of positive squares in 2 ways, for example, as 267093649 + 46240000 = 16343^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 313333649 - 2⁴ = 313333633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313333679) 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, 4234202 + ... + 4234275.

It is an arithmetic number, because the mean of its divisors is an integer number (80450541).

Almost surely, 2^313333649 is an apocalyptic number.

It is an amenable number.

313333649 is a deficient number, since it is larger than the sum of its proper divisors (8468515).

313333649 is an equidigital number, since it uses as much as digits as its factorization.

313333649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468514.

The product of its digits is 52488, while the sum is 35.

The square root of 313333649 is about 17701.2329796543. The cubic root of 313333649 is about 679.2073007635.

The spelling of 313333649 in words is "three hundred thirteen million, three hundred thirty-three thousand, six hundred forty-nine".