11639963 has 2 divisors, whose sum is σ = 11639964. Its totient is φ = 11639962.

The previous prime is 11639897. The next prime is 11639987. The reversal of 11639963 is 36993611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11639963 - 2⁸ = 11639707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11639363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819981 + 5819982.

It is an arithmetic number, because the mean of its divisors is an integer number (5819982).

Almost surely, 2^11639963 is an apocalyptic number.

11639963 is a deficient number, since it is larger than the sum of its proper divisors (1).

11639963 is an equidigital number, since it uses as much as digits as its factorization.

11639963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 11639963 is about 3411.7389993961. The cubic root of 11639963 is about 226.6298962364.

The spelling of 11639963 in words is "eleven million, six hundred thirty-nine thousand, nine hundred sixty-three".