421693 has 8 divisors (see below), whose sum is σ = 444416. Its totient is φ = 399600.

The previous prime is 421691. The next prime is 421697. The reversal of 421693 is 396124.

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 421693 - 2¹ = 421691 is a prime.

It is a d-powerful number, because it can be written as 4⁶ + 2¹⁷ + 6⁷ + 1 + 9⁴ + 3³ .

421693 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (55552).

2⁴²¹⁶⁹³ is an apocalyptic number.

It is an amenable number.

421693 is a deficient number, since it is larger than the sum of its proper divisors (22723).

421693 is a wasteful number, since it uses less digits than its factorization.

421693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315.

The product of its digits is 1296, while the sum is 25.

The square root of 421693 is about 649.3789340593. The cubic root of 421693 is about 74.9892132635.

The spelling of 421693 in words is "four hundred twenty-one thousand, six hundred ninety-three".