531621677 has 2 divisors, whose sum is σ = 531621678. Its totient is φ = 531621676.

The previous prime is 531621613. The next prime is 531621709. The reversal of 531621677 is 776126135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528034441 + 3587236 = 22979^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 531621677 - 2⁶ = 531621613 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531621677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531624677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265810838 + 265810839.

It is an arithmetic number, because the mean of its divisors is an integer number (265810839).

Almost surely, 2^531621677 is an apocalyptic number.

It is an amenable number.

531621677 is a deficient number, since it is larger than the sum of its proper divisors (1).

531621677 is an equidigital number, since it uses as much as digits as its factorization.

531621677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 531621677 is about 23056.9225396626. The cubic root of 531621677 is about 810.0917830253.

The spelling of 531621677 in words is "five hundred thirty-one million, six hundred twenty-one thousand, six hundred seventy-seven".