421003723 has 8 divisors (see below), whose sum is σ = 494151392. Its totient is φ = 351107136.

The previous prime is 421003711. The next prime is 421003733. The reversal of 421003723 is 327300124.

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

It is a cyclic number.

It is not a de Polignac number, because 421003723 - 2¹⁷ = 420872651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421003694 and 421003703.

It is not an unprimeable number, because it can be changed into a prime (421003733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812490 + ... + 813007.

It is an arithmetic number, because the mean of its divisors is an integer number (61768924).

Almost surely, 2^421003723 is an apocalyptic number.

421003723 is a deficient number, since it is larger than the sum of its proper divisors (73147669).

421003723 is a wasteful number, since it uses less digits than its factorization.

421003723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625541.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 421003723 is about 20518.3752524414. The cubic root of 421003723 is about 749.4833318575.

Adding to 421003723 its reverse (327300124), we get a palindrome (748303847).

The spelling of 421003723 in words is "four hundred twenty-one million, three thousand, seven hundred twenty-three".