538837021 has 2 divisors, whose sum is σ = 538837022. Its totient is φ = 538837020.

The previous prime is 538837003. The next prime is 538837027. The reversal of 538837021 is 120738835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497736100 + 41100921 = 22310^2 + 6411^2 .

It is a cyclic number.

It is not a de Polignac number, because 538837021 - 2¹⁷ = 538705949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538837027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269418510 + 269418511.

It is an arithmetic number, because the mean of its divisors is an integer number (269418511).

Almost surely, 2^538837021 is an apocalyptic number.

It is an amenable number.

538837021 is a deficient number, since it is larger than the sum of its proper divisors (1).

538837021 is an equidigital number, since it uses as much as digits as its factorization.

538837021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 538837021 is about 23212.8632658705. The cubic root of 538837021 is about 813.7402702307.

The spelling of 538837021 in words is "five hundred thirty-eight million, eight hundred thirty-seven thousand, twenty-one".