1908368421 has 8 divisors (see below), whose sum is σ = 2564527104. Its totient is φ = 1262227680.

The previous prime is 1908368389. The next prime is 1908368431. The reversal of 1908368421 is 1248638091.

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

It is not a de Polignac number, because 1908368421 - 2⁵ = 1908368389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908368431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2504040 + ... + 2504801.

It is an arithmetic number, because the mean of its divisors is an integer number (320565888).

Almost surely, 2^1908368421 is an apocalyptic number.

It is an amenable number.

1908368421 is a deficient number, since it is larger than the sum of its proper divisors (656158683).

1908368421 is a wasteful number, since it uses less digits than its factorization.

1908368421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008971.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1908368421 is about 43684.8763418188. The cubic root of 1908368421 is about 1240.3780543844.

The spelling of 1908368421 in words is "one billion, nine hundred eight million, three hundred sixty-eight thousand, four hundred twenty-one".