642908614 has 8 divisors (see below), whose sum is σ = 964646928. Its totient is φ = 321359640.

The previous prime is 642908587. The next prime is 642908647. The reversal of 642908614 is 416809246.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38517 + ... + 52624.

It is an arithmetic number, because the mean of its divisors is an integer number (120580866).

Almost surely, 2^642908614 is an apocalyptic number.

642908614 is a deficient number, since it is larger than the sum of its proper divisors (321738314).

642908614 is a wasteful number, since it uses less digits than its factorization.

642908614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94670.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 642908614 is about 25355.6426461646. The cubic root of 642908614 is about 863.0774072169.

The spelling of 642908614 in words is "six hundred forty-two million, nine hundred eight thousand, six hundred fourteen".