642318347 has 8 divisors (see below), whose sum is σ = 711170112. Its totient is φ = 575209800.

The previous prime is 642318343. The next prime is 642318421. The reversal of 642318347 is 743813246.

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

It is not a de Polignac number, because 642318347 - 2² = 642318343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642318347.

It is not an unprimeable number, because it can be changed into a prime (642318343) 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, 435029 + ... + 436502.

It is an arithmetic number, because the mean of its divisors is an integer number (88896264).

Almost surely, 2^642318347 is an apocalyptic number.

642318347 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

642318347 is a deficient number, since it is larger than the sum of its proper divisors (68851765).

642318347 is a wasteful number, since it uses less digits than its factorization.

642318347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871609.

The product of its digits is 96768, while the sum is 38.

The square root of 642318347 is about 25344.0002170139. Note that the first 3 decimals coincide. The cubic root of 642318347 is about 862.8131902446.

The spelling of 642318347 in words is "six hundred forty-two million, three hundred eighteen thousand, three hundred forty-seven".