538539997 has 2 divisors, whose sum is σ = 538539998. Its totient is φ = 538539996.

The previous prime is 538539983. The next prime is 538540001. The reversal of 538539997 is 799935835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377097561 + 161442436 = 19419^2 + 12706^2 .

It is a cyclic number.

It is not a de Polignac number, because 538539997 - 2¹¹ = 538537949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538539497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269269998 + 269269999.

It is an arithmetic number, because the mean of its divisors is an integer number (269269999).

Almost surely, 2^538539997 is an apocalyptic number.

It is an amenable number.

538539997 is a deficient number, since it is larger than the sum of its proper divisors (1).

538539997 is an equidigital number, since it uses as much as digits as its factorization.

538539997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 58.

The square root of 538539997 is about 23206.4645519304. The cubic root of 538539997 is about 813.5907229618.

The spelling of 538539997 in words is "five hundred thirty-eight million, five hundred thirty-nine thousand, nine hundred ninety-seven".