538649137 has 6 divisors (see below), whose sum is σ = 583271142. Its totient is φ = 497214432.

The previous prime is 538649129. The next prime is 538649143. The reversal of 538649137 is 731946835.

It can be written as a sum of positive squares in 3 ways, for example, as 19219456 + 519429681 = 4384^2 + 22791^2 .

It is not a de Polignac number, because 538649137 - 2³ = 538649129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538649117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1593468 + ... + 1593805.

It is an arithmetic number, because the mean of its divisors is an integer number (97211857).

Almost surely, 2^538649137 is an apocalyptic number.

It is an amenable number.

538649137 is a deficient number, since it is larger than the sum of its proper divisors (44622005).

538649137 is a wasteful number, since it uses less digits than its factorization.

538649137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187299 (or 3187286 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 538649137 is about 23208.8159327442. The cubic root of 538649137 is about 813.6456797550.

It can be divided in two parts, 53864 and 9137, that added together give a square (63001 = 251²).

The spelling of 538649137 in words is "five hundred thirty-eight million, six hundred forty-nine thousand, one hundred thirty-seven".