538233997 has 32 divisors (see below), whose sum is σ = 664934400. Its totient is φ = 426222720.

The previous prime is 538233977. The next prime is 538234003. The reversal of 538233997 is 799332835.

It is a happy number.

It is not a de Polignac number, because 538233997 - 2⁷ = 538233869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538233997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538233977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6047529 + ... + 6047617.

It is an arithmetic number, because the mean of its divisors is an integer number (20779200).

Almost surely, 2^538233997 is an apocalyptic number.

It is an amenable number.

538233997 is a deficient number, since it is larger than the sum of its proper divisors (126700403).

538233997 is an frugal number, since it uses more digits than its factorization.

538233997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 156 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 49.

The square root of 538233997 is about 23199.8706246393. The cubic root of 538233997 is about 813.4365988914.

The spelling of 538233997 in words is "five hundred thirty-eight million, two hundred thirty-three thousand, nine hundred ninety-seven".