642684327 has 8 divisors (see below), whose sum is σ = 857336064. Its totient is φ = 428244408.

The previous prime is 642684293. The next prime is 642684347. The reversal of 642684327 is 723486246.

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

It is not a de Polignac number, because 642684327 - 2⁷ = 642684199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642684347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45733 + ... + 58110.

It is an arithmetic number, because the mean of its divisors is an integer number (107167008).

Almost surely, 2^642684327 is an apocalyptic number.

642684327 is a deficient number, since it is larger than the sum of its proper divisors (214651737).

642684327 is a wasteful number, since it uses less digits than its factorization.

642684327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105909.

The product of its digits is 387072, while the sum is 42.

The square root of 642684327 is about 25351.2194381257. The cubic root of 642684327 is about 862.9770302980.

The spelling of 642684327 in words is "six hundred forty-two million, six hundred eighty-four thousand, three hundred twenty-seven".