646904954 has 8 divisors (see below), whose sum is σ = 970494708. Its totient is φ = 323406720.

The previous prime is 646904933. The next prime is 646904959. The reversal of 646904954 is 459409646.

It can be written as a sum of positive squares in 2 ways, for example, as 589372729 + 57532225 = 24277^2 + 7585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 646904899 and 646904908.

It is not an unprimeable number, because it can be changed into a prime (646904959) 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, 1037 + ... + 35984.

Almost surely, 2^646904954 is an apocalyptic number.

646904954 is a deficient number, since it is larger than the sum of its proper divisors (323589754).

646904954 is a wasteful number, since it uses less digits than its factorization.

646904954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45760.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 646904954 is about 25434.3262934169. The cubic root of 646904954 is about 864.8620199351.

The spelling of 646904954 in words is "six hundred forty-six million, nine hundred four thousand, nine hundred fifty-four".