423578773 has 2 divisors, whose sum is σ = 423578774. Its totient is φ = 423578772.

The previous prime is 423578747. The next prime is 423578801. The reversal of 423578773 is 377875324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418529764 + 5049009 = 20458^2 + 2247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423578773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423578713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211789386 + 211789387.

It is an arithmetic number, because the mean of its divisors is an integer number (211789387).

Almost surely, 2^423578773 is an apocalyptic number.

It is an amenable number.

423578773 is a deficient number, since it is larger than the sum of its proper divisors (1).

423578773 is an equidigital number, since it uses as much as digits as its factorization.

423578773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 46.

The square root of 423578773 is about 20581.0294446123. The cubic root of 423578773 is about 751.0082871279.

The spelling of 423578773 in words is "four hundred twenty-three million, five hundred seventy-eight thousand, seven hundred seventy-three".