538168291 has 4 divisors (see below), whose sum is σ = 546990784. Its totient is φ = 529345800.

The previous prime is 538168271. The next prime is 538168297. The reversal of 538168291 is 192861835.

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

It is not a de Polignac number, because 538168291 - 2⁵ = 538168259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538168297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4411155 + ... + 4411276.

It is an arithmetic number, because the mean of its divisors is an integer number (136747696).

Almost surely, 2^538168291 is an apocalyptic number.

538168291 is a deficient number, since it is larger than the sum of its proper divisors (8822493).

538168291 is an equidigital number, since it uses as much as digits as its factorization.

538168291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822492.

The product of its digits is 103680, while the sum is 43.

The square root of 538168291 is about 23198.4544959357. The cubic root of 538168291 is about 813.4034969070.

The spelling of 538168291 in words is "five hundred thirty-eight million, one hundred sixty-eight thousand, two hundred ninety-one".