646311683 has 4 divisors (see below), whose sum is σ = 647022048. Its totient is φ = 645601320.

The previous prime is 646311643. The next prime is 646311689. The reversal of 646311683 is 386113646.

It is a happy number.

646311683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 646311683 - 2¹⁶ = 646246147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646311689) 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, 353816 + ... + 355637.

It is an arithmetic number, because the mean of its divisors is an integer number (161755512).

Almost surely, 2^646311683 is an apocalyptic number.

646311683 is a deficient number, since it is larger than the sum of its proper divisors (710365).

646311683 is an equidigital number, since it uses as much as digits as its factorization.

646311683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710364.

The product of its digits is 62208, while the sum is 38.

The square root of 646311683 is about 25422.6608166809. The cubic root of 646311683 is about 864.5975532182.

The spelling of 646311683 in words is "six hundred forty-six million, three hundred eleven thousand, six hundred eighty-three".