642368419 has 8 divisors (see below), whose sum is σ = 800875008. Its totient is φ = 500546760.

The previous prime is 642368417. The next prime is 642368423. The reversal of 642368419 is 914863246.

It is a happy number.

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

It is not a de Polignac number, because 642368419 - 2¹ = 642368417 is a prime.

It is a super-2 number, since 2×642368419² = 825274371457119122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642368417) 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, 4171147 + ... + 4171300.

It is an arithmetic number, because the mean of its divisors is an integer number (100109376).

Almost surely, 2^642368419 is an apocalyptic number.

642368419 is a deficient number, since it is larger than the sum of its proper divisors (158506589).

642368419 is a wasteful number, since it uses less digits than its factorization.

642368419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342465.

The product of its digits is 248832, while the sum is 43.

The square root of 642368419 is about 25344.9880449765. The cubic root of 642368419 is about 862.8356098956.

The spelling of 642368419 in words is "six hundred forty-two million, three hundred sixty-eight thousand, four hundred nineteen".