531388089 has 12 divisors (see below), whose sum is σ = 769347072. Its totient is φ = 353434200.

The previous prime is 531388031. The next prime is 531388127. The reversal of 531388089 is 980883135.

531388089 is a `hidden beast` number, since 531 + 38 + 8 + 0 + 89 = 666.

It is not a de Polignac number, because 531388089 - 2¹¹ = 531386041 is a prime.

It is a super-2 number, since 2×531388089² = 564746602262143842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531388889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64617 + ... + 72374.

It is an arithmetic number, because the mean of its divisors is an integer number (64112256).

Almost surely, 2^531388089 is an apocalyptic number.

It is an amenable number.

531388089 is a deficient number, since it is larger than the sum of its proper divisors (237958983).

531388089 is a wasteful number, since it uses less digits than its factorization.

531388089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137428 (or 137425 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 531388089 is about 23051.8565195951. The cubic root of 531388089 is about 809.9731175349.

The spelling of 531388089 in words is "five hundred thirty-one million, three hundred eighty-eight thousand, eighty-nine".