423693139005 has 54 divisors (see below), whose sum is σ = 775240300926. Its totient is φ = 214034615136.

The previous prime is 423693138961. The next prime is 423693139031. The reversal of 423693139005 is 500931396324.

423693139005 is a `hidden beast` number, since 423 + 6 + 93 + 139 + 0 + 0 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 338954511204 + 84738627801 = 582198^2 + 291099^2 .

It is not a de Polignac number, because 423693139005 - 2⁹ = 423693138493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 82960662 + ... + 82965768.

It is an arithmetic number, because the mean of its divisors is an integer number (14356301869).

Almost surely, 2^423693139005 is an apocalyptic number.

423693139005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423693139005 is a deficient number, since it is larger than the sum of its proper divisors (351547161921).

423693139005 is an frugal number, since it uses more digits than its factorization.

423693139005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263 (or 5134 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 45.

Multiplying 423693139005 by its sum of digits (45), we get a square (19066191255225 = 4366485²).

423693139005 divided by its sum of digits (45) gives a square (9415403089 = 97033²).

The spelling of 423693139005 in words is "four hundred twenty-three billion, six hundred ninety-three million, one hundred thirty-nine thousand, five".