639054574 has 8 divisors (see below), whose sum is σ = 967376520. Its totient is φ = 316595736.

The previous prime is 639054571. The next prime is 639054587. The reversal of 639054574 is 475450936.

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

It is a self number, because there is not a number n which added to its sum of digits gives 639054574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639054571) 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, 1465504 + ... + 1465939.

It is an arithmetic number, because the mean of its divisors is an integer number (120922065).

Almost surely, 2^639054574 is an apocalyptic number.

639054574 is a deficient number, since it is larger than the sum of its proper divisors (328321946).

639054574 is a wasteful number, since it uses less digits than its factorization.

639054574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931554.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 639054574 is about 25279.5287535191. The cubic root of 639054574 is about 861.3493213537.

The spelling of 639054574 in words is "six hundred thirty-nine million, fifty-four thousand, five hundred seventy-four".