538394423 has 4 divisors (see below), whose sum is σ = 615307920. Its totient is φ = 461480928.

The previous prime is 538394407. The next prime is 538394477. The reversal of 538394423 is 324493835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324493835 = 5 ⋅64898767.

It is a cyclic number.

It is not a de Polignac number, because 538394423 - 2⁴ = 538394407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538394023) 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, 38456738 + ... + 38456751.

It is an arithmetic number, because the mean of its divisors is an integer number (153826980).

Almost surely, 2^538394423 is an apocalyptic number.

538394423 is a deficient number, since it is larger than the sum of its proper divisors (76913497).

538394423 is an equidigital number, since it uses as much as digits as its factorization.

538394423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76913496.

The product of its digits is 311040, while the sum is 41.

The square root of 538394423 is about 23203.3278432211. The cubic root of 538394423 is about 813.5174084882.

The spelling of 538394423 in words is "five hundred thirty-eight million, three hundred ninety-four thousand, four hundred twenty-three".