56683923421 has 4 divisors (see below), whose sum is σ = 58638541500. Its totient is φ = 54729305344.

The previous prime is 56683923419. The next prime is 56683923493. The reversal of 56683923421 is 12432938665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47343667396 + 9340256025 = 217586^2 + 96645^2 .

It is a cyclic number.

It is not a de Polignac number, because 56683923421 - 2¹ = 56683923419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56683903421) 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 3 ways as a sum of consecutive naturals, for example, 977308996 + ... + 977309053.

It is an arithmetic number, because the mean of its divisors is an integer number (14659635375).

Almost surely, 2^56683923421 is an apocalyptic number.

It is an amenable number.

56683923421 is a deficient number, since it is larger than the sum of its proper divisors (1954618079).

56683923421 is a wasteful number, since it uses less digits than its factorization.

56683923421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954618078.

The product of its digits is 1866240, while the sum is 49.

The spelling of 56683923421 in words is "fifty-six billion, six hundred eighty-three million, nine hundred twenty-three thousand, four hundred twenty-one".