423660451 has 4 divisors (see below), whose sum is σ = 448581672. Its totient is φ = 398739232.

The previous prime is 423660439. The next prime is 423660473. The reversal of 423660451 is 154066324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423660451 - 2¹⁵ = 423627683 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423660431) 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, 12460585 + ... + 12460618.

It is an arithmetic number, because the mean of its divisors is an integer number (112145418).

Almost surely, 2^423660451 is an apocalyptic number.

423660451 is a deficient number, since it is larger than the sum of its proper divisors (24921221).

423660451 is a wasteful number, since it uses less digits than its factorization.

423660451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24921220.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 423660451 is about 20583.0136520384. The cubic root of 423660451 is about 751.0565559242.

The spelling of 423660451 in words is "four hundred twenty-three million, six hundred sixty thousand, four hundred fifty-one".