531071689 has 2 divisors, whose sum is σ = 531071690. Its totient is φ = 531071688.

The previous prime is 531071663. The next prime is 531071711. The reversal of 531071689 is 986170135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359671225 + 171400464 = 18965^2 + 13092^2 .

It is a cyclic number.

It is not a de Polignac number, because 531071689 - 2⁵ = 531071657 is a prime.

It is a Chen prime.

It is equal to p_27903982 and since 531071689 and 27903982 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (531071389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265535844 + 265535845.

It is an arithmetic number, because the mean of its divisors is an integer number (265535845).

Almost surely, 2^531071689 is an apocalyptic number.

It is an amenable number.

531071689 is a deficient number, since it is larger than the sum of its proper divisors (1).

531071689 is an equidigital number, since it uses as much as digits as its factorization.

531071689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 531071689 is about 23044.9927099142. The cubic root of 531071689 is about 809.8123270941.

The spelling of 531071689 in words is "five hundred thirty-one million, seventy-one thousand, six hundred eighty-nine".