420775723 has 8 divisors (see below), whose sum is σ = 426940928. Its totient is φ = 414621504.

The previous prime is 420775717. The next prime is 420775739. The reversal of 420775723 is 327577024.

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 420775723 - 2²¹ = 418678571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420775763) 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, 104086 + ... + 108052.

It is an arithmetic number, because the mean of its divisors is an integer number (53367616).

Almost surely, 2^420775723 is an apocalyptic number.

420775723 is a deficient number, since it is larger than the sum of its proper divisors (6165205).

420775723 is a wasteful number, since it uses less digits than its factorization.

420775723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493.

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 420775723 is about 20512.8185045352. The cubic root of 420775723 is about 749.3480099688.

It can be divided in two parts, 4207 and 75723, that multiplied together give a triangular number (318566661 = T₂₅₂₄₁).

The spelling of 420775723 in words is "four hundred twenty million, seven hundred seventy-five thousand, seven hundred twenty-three".