253663421 has 8 divisors (see below), whose sum is σ = 285650688. Its totient is φ = 223164000.

The previous prime is 253663363. The next prime is 253663429. The reversal of 253663421 is 124366352.

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 253663421 - 2¹⁸ = 253401277 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 (253663429) 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 7 ways as a sum of consecutive naturals, for example, 371600 + ... + 372281.

It is an arithmetic number, because the mean of its divisors is an integer number (35706336).

Almost surely, 2^253663421 is an apocalyptic number.

It is an amenable number.

253663421 is a deficient number, since it is larger than the sum of its proper divisors (31987267).

253663421 is a wasteful number, since it uses less digits than its factorization.

253663421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743923.

The product of its digits is 25920, while the sum is 32.

The square root of 253663421 is about 15926.8145277077. The cubic root of 253663421 is about 633.0226967563.

The spelling of 253663421 in words is "two hundred fifty-three million, six hundred sixty-three thousand, four hundred twenty-one".