423721755 has 96 divisors (see below), whose sum is σ = 835660800. Its totient is φ = 197455104.

The previous prime is 423721747. The next prime is 423721759. The reversal of 423721755 is 557127324.

It is not a de Polignac number, because 423721755 - 2³ = 423721747 is a prime.

It is a super-3 number, since 3×423721755³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (423721759) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 569914 + ... + 570656.

It is an arithmetic number, because the mean of its divisors is an integer number (8704800).

Almost surely, 2^423721755 is an apocalyptic number.

423721755 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

423721755 is a deficient number, since it is larger than the sum of its proper divisors (411939045).

423721755 is a wasteful number, since it uses less digits than its factorization.

423721755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 822 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 423721755 is about 20584.5027872912. The cubic root of 423721755 is about 751.0927803349.

The spelling of 423721755 in words is "four hundred twenty-three million, seven hundred twenty-one thousand, seven hundred fifty-five".