538091437 has 16 divisors (see below), whose sum is σ = 585794160. Its totient is φ = 494247936.

The previous prime is 538091413. The next prime is 538091441. The reversal of 538091437 is 734190835.

It can be written as a sum of positive squares in 8 ways, for example, as 218182441 + 319908996 = 14771^2 + 17886^2 .

It is not a de Polignac number, because 538091437 - 2¹⁵ = 538058669 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 538091437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538091237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564153 + ... + 565105.

It is an arithmetic number, because the mean of its divisors is an integer number (36612135).

Almost surely, 2^538091437 is an apocalyptic number.

It is an amenable number.

538091437 is a deficient number, since it is larger than the sum of its proper divisors (47702723).

538091437 is an equidigital number, since it uses as much as digits as its factorization.

538091437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 538091437 is about 23196.7979902399. The cubic root of 538091437 is about 813.3647752596.

The spelling of 538091437 in words is "five hundred thirty-eight million, ninety-one thousand, four hundred thirty-seven".