477313721421 has 4 divisors (see below), whose sum is σ = 636418295232. Its totient is φ = 318209147612.

The previous prime is 477313721351. The next prime is 477313721449. The reversal of 477313721421 is 124127313774.

It is a happy number.

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 477313721421 - 2⁹ = 477313720909 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 (477313721471) 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, 79552286901 + ... + 79552286906.

It is an arithmetic number, because the mean of its divisors is an integer number (159104573808).

Almost surely, 2^477313721421 is an apocalyptic number.

It is an amenable number.

477313721421 is a deficient number, since it is larger than the sum of its proper divisors (159104573811).

477313721421 is a wasteful number, since it uses less digits than its factorization.

477313721421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159104573810.

The product of its digits is 197568, while the sum is 42.

The spelling of 477313721421 in words is "four hundred seventy-seven billion, three hundred thirteen million, seven hundred twenty-one thousand, four hundred twenty-one".