538651 has 2 divisors, whose sum is σ = 538652. Its totient is φ = 538650.

The previous prime is 538649. The next prime is 538697. The reversal of 538651 is 156835.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 538651 - 2¹ = 538649 is a prime.

Together with 538649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (538621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269325 + 269326.

It is an arithmetic number, because the mean of its divisors is an integer number (269326).

2⁵³⁸⁶⁵¹ is an apocalyptic number.

538651 is a deficient number, since it is larger than the sum of its proper divisors (1).

538651 is an equidigital number, since it uses as much as digits as its factorization.

538651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 538651 is about 733.9284706291. The cubic root of 538651 is about 81.3646617793.

The spelling of 538651 in words is "five hundred thirty-eight thousand, six hundred fifty-one".