538505977 has 2 divisors, whose sum is σ = 538505978. Its totient is φ = 538505976.

The previous prime is 538505911. The next prime is 538505983. The reversal of 538505977 is 779505835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361722361 + 176783616 = 19019^2 + 13296^2 .

It is a cyclic number.

It is not a de Polignac number, because 538505977 - 2²³ = 530117369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538505977.

It is not a weakly prime, because it can be changed into another prime (538505777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269252988 + 269252989.

It is an arithmetic number, because the mean of its divisors is an integer number (269252989).

Almost surely, 2^538505977 is an apocalyptic number.

It is an amenable number.

538505977 is a deficient number, since it is larger than the sum of its proper divisors (1).

538505977 is an equidigital number, since it uses as much as digits as its factorization.

538505977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323000, while the sum is 49.

The square root of 538505977 is about 23205.7315549413. The cubic root of 538505977 is about 813.5735908767.

The spelling of 538505977 in words is "five hundred thirty-eight million, five hundred five thousand, nine hundred seventy-seven".