531632729 has 2 divisors, whose sum is σ = 531632730. Its totient is φ = 531632728.

The previous prime is 531632723. The next prime is 531632753. The reversal of 531632729 is 927236135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499969600 + 31663129 = 22360^2 + 5627^2 .

It is a cyclic number.

It is not a de Polignac number, because 531632729 - 2²⁴ = 514855513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 531632692 and 531632701.

It is not a weakly prime, because it can be changed into another prime (531632723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265816364 + 265816365.

It is an arithmetic number, because the mean of its divisors is an integer number (265816365).

Almost surely, 2^531632729 is an apocalyptic number.

It is an amenable number.

531632729 is a deficient number, since it is larger than the sum of its proper divisors (1).

531632729 is an equidigital number, since it uses as much as digits as its factorization.

531632729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 38.

The square root of 531632729 is about 23057.1622061346. The cubic root of 531632729 is about 810.0973967118.

The spelling of 531632729 in words is "five hundred thirty-one million, six hundred thirty-two thousand, seven hundred twenty-nine".