539103991 has 2 divisors, whose sum is σ = 539103992. Its totient is φ = 539103990.

The previous prime is 539103989. The next prime is 539104021. The reversal of 539103991 is 199301935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 539103991 - 2¹ = 539103989 is a prime.

It is a super-2 number, since 2×539103991² = 581266226224256162, which contains 22 as substring.

Together with 539103989, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539103911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269551995 + 269551996.

It is an arithmetic number, because the mean of its divisors is an integer number (269551996).

Almost surely, 2^539103991 is an apocalyptic number.

539103991 is a deficient number, since it is larger than the sum of its proper divisors (1).

539103991 is an equidigital number, since it uses as much as digits as its factorization.

539103991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 539103991 is about 23218.6130292057. The cubic root of 539103991 is about 813.8746388573.

The spelling of 539103991 in words is "five hundred thirty-nine million, one hundred three thousand, nine hundred ninety-one".