768194421 has 4 divisors (see below), whose sum is σ = 1024259232. Its totient is φ = 512129612.

The previous prime is 768194417. The next prime is 768194423. The reversal of 768194421 is 124491867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 768194421 - 2² = 768194417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768194423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128032401 + ... + 128032406.

It is an arithmetic number, because the mean of its divisors is an integer number (256064808).

Almost surely, 2^768194421 is an apocalyptic number.

It is an amenable number.

768194421 is a deficient number, since it is larger than the sum of its proper divisors (256064811).

768194421 is a wasteful number, since it uses less digits than its factorization.

768194421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256064810.

The product of its digits is 96768, while the sum is 42.

The square root of 768194421 is about 27716.3204809008. The cubic root of 768194421 is about 915.8486640809.

The spelling of 768194421 in words is "seven hundred sixty-eight million, one hundred ninety-four thousand, four hundred twenty-one".