642348347 has 16 divisors (see below), whose sum is σ = 698941440. Its totient is φ = 588484512.

The previous prime is 642348341. The next prime is 642348359. The reversal of 642348347 is 743843246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 642348347 - 2⁴ = 642348331 is a prime.

It is a super-3 number, since 3×642348347³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642348341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80918 + ... + 88500.

It is an arithmetic number, because the mean of its divisors is an integer number (43683840).

Almost surely, 2^642348347 is an apocalyptic number.

642348347 is a deficient number, since it is larger than the sum of its proper divisors (56593093).

642348347 is a wasteful number, since it uses less digits than its factorization.

642348347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762.

The product of its digits is 387072, while the sum is 41.

The square root of 642348347 is about 25344.5920661588. The cubic root of 642348347 is about 862.8266228324.

The spelling of 642348347 in words is "six hundred forty-two million, three hundred forty-eight thousand, three hundred forty-seven".