423078729 has 4 divisors (see below), whose sum is σ = 564104976. Its totient is φ = 282052484.

The previous prime is 423078703. The next prime is 423078743. The reversal of 423078729 is 927870324.

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 not a de Polignac number, because 423078729 - 2⁹ = 423078217 is a prime.

It is a super-2 number, since 2×423078729² = 357991221864510882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423078329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70513119 + ... + 70513124.

It is an arithmetic number, because the mean of its divisors is an integer number (141026244).

Almost surely, 2^423078729 is an apocalyptic number.

It is an amenable number.

423078729 is a deficient number, since it is larger than the sum of its proper divisors (141026247).

423078729 is a wasteful number, since it uses less digits than its factorization.

423078729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141026246.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 423078729 is about 20568.8776796402. The cubic root of 423078729 is about 750.7126435267.

The spelling of 423078729 in words is "four hundred twenty-three million, seventy-eight thousand, seven hundred twenty-nine".