423399220801 has 4 divisors (see below), whose sum is σ = 433245714352. Its totient is φ = 413552727252.

The previous prime is 423399220787. The next prime is 423399220807. The reversal of 423399220801 is 108022993324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423399220801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 9846493507 = 423399220801 / (4 + 2 + 3 + 3 + 9 + 9 + 2 + 2 + 0 + 8 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423399220807) 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 3 ways as a sum of consecutive naturals, for example, 4923246711 + ... + 4923246796.

It is an arithmetic number, because the mean of its divisors is an integer number (108311428588).

Almost surely, 2^423399220801 is an apocalyptic number.

It is an amenable number.

423399220801 is a deficient number, since it is larger than the sum of its proper divisors (9846493551).

423399220801 is an equidigital number, since it uses as much as digits as its factorization.

423399220801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846493550.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 423399220801 in words is "four hundred twenty-three billion, three hundred ninety-nine million, two hundred twenty thousand, eight hundred one".