423067779 has 20 divisors (see below), whose sum is σ = 634538520. Its totient is φ = 280908000.

The previous prime is 423067759. The next prime is 423067781. The reversal of 423067779 is 977760324.

It is a happy number.

It is not a de Polignac number, because 423067779 - 2¹³ = 423059587 is a prime.

It is a super-4 number, since 4×423067779⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (423067709) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9927 + ... + 30735.

It is an arithmetic number, because the mean of its divisors is an integer number (31726926).

Almost surely, 2^423067779 is an apocalyptic number.

423067779 is a deficient number, since it is larger than the sum of its proper divisors (211470741).

423067779 is a wasteful number, since it uses less digits than its factorization.

423067779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072 (or 21063 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The square root of 423067779 is about 20568.6114990779. The cubic root of 423067779 is about 750.7061668957.

The spelling of 423067779 in words is "four hundred twenty-three million, sixty-seven thousand, seven hundred seventy-nine".