538347997 has 12 divisors (see below), whose sum is σ = 601446748. Its totient is φ = 481377600.

The previous prime is 538347989. The next prime is 538348021. The reversal of 538347997 is 799743835.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 270076356 + 268271641 = 16434^2 + 16379^2 .

It is not a de Polignac number, because 538347997 - 2³ = 538347989 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 (538347947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29088 + ... + 43849.

Almost surely, 2^538347997 is an apocalyptic number.

It is an amenable number.

538347997 is a deficient number, since it is larger than the sum of its proper divisors (63098751).

538347997 is a wasteful number, since it uses less digits than its factorization.

538347997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73020 (or 73009 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 55.

The square root of 538347997 is about 23202.3274048101. The cubic root of 538347997 is about 813.4940244886.

The spelling of 538347997 in words is "five hundred thirty-eight million, three hundred forty-seven thousand, nine hundred ninety-seven".