2539963 has 2 divisors, whose sum is σ = 2539964. Its totient is φ = 2539962.

The previous prime is 2539961. The next prime is 2539981. The reversal of 2539963 is 3699352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2539963 - 2¹ = 2539961 is a prime.

Together with 2539961, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁹ + 3⁷ + 9 + 9 + 6⁴ + 3¹⁰ .

It is not a weakly prime, because it can be changed into another prime (2539961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269981 + 1269982.

It is an arithmetic number, because the mean of its divisors is an integer number (1269982).

2^2539963 is an apocalyptic number.

2539963 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539963 is an equidigital number, since it uses as much as digits as its factorization.

2539963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 37.

The square root of 2539963 is about 1593.7261370763. The cubic root of 2539963 is about 136.4402364647.

The spelling of 2539963 in words is "two million, five hundred thirty-nine thousand, nine hundred sixty-three".