421388763 has 16 divisors (see below), whose sum is σ = 589420800. Its totient is φ = 267414560.

The previous prime is 421388761. The next prime is 421388771. The reversal of 421388763 is 367883124.

It is a cyclic number.

It is not a de Polignac number, because 421388763 - 2¹ = 421388761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421388761) 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 15 ways as a sum of consecutive naturals, for example, 27933 + ... + 40286.

It is an arithmetic number, because the mean of its divisors is an integer number (36838800).

Almost surely, 2^421388763 is an apocalyptic number.

421388763 is a deficient number, since it is larger than the sum of its proper divisors (168032037).

421388763 is a wasteful number, since it uses less digits than its factorization.

421388763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68322.

The product of its digits is 193536, while the sum is 42.

The square root of 421388763 is about 20527.7559172940. The cubic root of 421388763 is about 749.7117487847.

The spelling of 421388763 in words is "four hundred twenty-one million, three hundred eighty-eight thousand, seven hundred sixty-three".