423504557 has 4 divisors (see below), whose sum is σ = 484005216. Its totient is φ = 363003900.

The previous prime is 423504551. The next prime is 423504559. The reversal of 423504557 is 755405324.

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 not a de Polignac number, because 423504557 - 2¹² = 423500461 is a prime.

It is a super-2 number, since 2×423504557² = 358712219599532498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423504551) 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, 30250319 + ... + 30250332.

It is an arithmetic number, because the mean of its divisors is an integer number (121001304).

Almost surely, 2^423504557 is an apocalyptic number.

It is an amenable number.

423504557 is a deficient number, since it is larger than the sum of its proper divisors (60500659).

423504557 is an equidigital number, since it uses as much as digits as its factorization.

423504557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60500658.

The product of its (nonzero) digits is 84000, while the sum is 35.

The square root of 423504557 is about 20579.2263460024. The cubic root of 423504557 is about 750.9644227276.

The spelling of 423504557 in words is "four hundred twenty-three million, five hundred four thousand, five hundred fifty-seven".