531921877 has 2 divisors, whose sum is σ = 531921878. Its totient is φ = 531921876.

The previous prime is 531921829. The next prime is 531921899. The reversal of 531921877 is 778129135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376321201 + 155600676 = 19399^2 + 12474^2 .

It is a cyclic number.

It is not a de Polignac number, because 531921877 - 2¹⁵ = 531889109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531921827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265960938 + 265960939.

It is an arithmetic number, because the mean of its divisors is an integer number (265960939).

Almost surely, 2^531921877 is an apocalyptic number.

It is an amenable number.

531921877 is a deficient number, since it is larger than the sum of its proper divisors (1).

531921877 is an equidigital number, since it uses as much as digits as its factorization.

531921877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 531921877 is about 23063.4315963605. The cubic root of 531921877 is about 810.2442371750.

The spelling of 531921877 in words is "five hundred thirty-one million, nine hundred twenty-one thousand, eight hundred seventy-seven".