538034921 has 4 divisors (see below), whose sum is σ = 569684052. Its totient is φ = 506385792.

The previous prime is 538034899. The next prime is 538034927. The reversal of 538034921 is 129430835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 415711321 + 122323600 = 20389^2 + 11060^2 .

It is a cyclic number.

It is not a de Polignac number, because 538034921 - 2¹⁸ = 537772777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538034927) 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 3 ways as a sum of consecutive naturals, for example, 15824540 + ... + 15824573.

It is an arithmetic number, because the mean of its divisors is an integer number (142421013).

Almost surely, 2^538034921 is an apocalyptic number.

It is an amenable number.

538034921 is a deficient number, since it is larger than the sum of its proper divisors (31649131).

538034921 is a wasteful number, since it uses less digits than its factorization.

538034921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31649130.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 538034921 is about 23195.5797728791. The cubic root of 538034921 is about 813.3362982326.

The spelling of 538034921 in words is "five hundred thirty-eight million, thirty-four thousand, nine hundred twenty-one".