538211709 has 48 divisors (see below), whose sum is σ = 924862848. Its totient is φ = 306389952.

The previous prime is 538211701. The next prime is 538211717. The reversal of 538211709 is 907112835.

538211709 is a `hidden beast` number, since 538 + 2 + 117 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (538211701) and next prime (538211717).

It is not a de Polignac number, because 538211709 - 2³ = 538211701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538211701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 674899 + ... + 675695.

It is an arithmetic number, because the mean of its divisors is an integer number (19267976).

Almost surely, 2^538211709 is an apocalyptic number.

It is an amenable number.

538211709 is a deficient number, since it is larger than the sum of its proper divisors (386651139).

538211709 is an equidigital number, since it uses as much as digits as its factorization.

538211709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 538211709 is about 23199.3902721602. The cubic root of 538211709 is about 813.4253707359.

The spelling of 538211709 in words is "five hundred thirty-eight million, two hundred eleven thousand, seven hundred nine".