539350661 has 2 divisors, whose sum is σ = 539350662. Its totient is φ = 539350660.

The previous prime is 539350657. The next prime is 539350681. The reversal of 539350661 is 166053935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278689636 + 260661025 = 16694^2 + 16145^2 .

It is a cyclic number.

It is not a de Polignac number, because 539350661 - 2² = 539350657 is a prime.

It is a super-3 number, since 3×539350661³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539350601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269675330 + 269675331.

It is an arithmetic number, because the mean of its divisors is an integer number (269675331).

Almost surely, 2^539350661 is an apocalyptic number.

It is an amenable number.

539350661 is a deficient number, since it is larger than the sum of its proper divisors (1).

539350661 is an equidigital number, since it uses as much as digits as its factorization.

539350661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 539350661 is about 23223.9243238519. The cubic root of 539350661 is about 813.9987508709.

The spelling of 539350661 in words is "five hundred thirty-nine million, three hundred fifty thousand, six hundred sixty-one".