646308974 has 4 divisors (see below), whose sum is σ = 969463464. Its totient is φ = 323154486.

The previous prime is 646308973. The next prime is 646308979. The reversal of 646308974 is 479803646.

646308974 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (646308973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161577242 + ... + 161577245.

It is an arithmetic number, because the mean of its divisors is an integer number (242365866).

Almost surely, 2^646308974 is an apocalyptic number.

646308974 is a deficient number, since it is larger than the sum of its proper divisors (323154490).

646308974 is a wasteful number, since it uses less digits than its factorization.

646308974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323154489.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 646308974 is about 25422.6075373869. The cubic root of 646308974 is about 864.5963452365.

The spelling of 646308974 in words is "six hundred forty-six million, three hundred eight thousand, nine hundred seventy-four".