421750783 has 4 divisors (see below), whose sum is σ = 422579880. Its totient is φ = 420921688.

The previous prime is 421750781. The next prime is 421750789. The reversal of 421750783 is 387057124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421750783 - 2¹ = 421750781 is a prime.

It is a super-2 number, since 2×421750783² = 355747445922226178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421750781) 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, 413785 + ... + 414802.

It is an arithmetic number, because the mean of its divisors is an integer number (105644970).

Almost surely, 2^421750783 is an apocalyptic number.

421750783 is a deficient number, since it is larger than the sum of its proper divisors (829097).

421750783 is an equidigital number, since it uses as much as digits as its factorization.

421750783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829096.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 421750783 is about 20536.5718414734. The cubic root of 421750783 is about 749.9263827002.

The spelling of 421750783 in words is "four hundred twenty-one million, seven hundred fifty thousand, seven hundred eighty-three".