2509963 has 2 divisors, whose sum is σ = 2509964. Its totient is φ = 2509962.

The previous prime is 2509961. The next prime is 2509981. The reversal of 2509963 is 3699052.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2509963 - 2¹ = 2509961 is a prime.

It is a super-2 number, since 2×2509963² = 12599828522738, which contains 22 as substring.

Together with 2509961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2509961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1254981 + 1254982.

It is an arithmetic number, because the mean of its divisors is an integer number (1254982).

2^2509963 is an apocalyptic number.

2509963 is a deficient number, since it is larger than the sum of its proper divisors (1).

2509963 is an equidigital number, since it uses as much as digits as its factorization.

2509963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2509963 is about 1584.2862746360. The cubic root of 2509963 is about 135.9009334773.

The spelling of 2509963 in words is "two million, five hundred nine thousand, nine hundred sixty-three".