11623987 has 2 divisors, whose sum is σ = 11623988. Its totient is φ = 11623986.

The previous prime is 11623979. The next prime is 11623999. The reversal of 11623987 is 78932611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11623987 - 2³ = 11623979 is a prime.

It is not a weakly prime, because it can be changed into another prime (11623387) 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, 5811993 + 5811994.

It is an arithmetic number, because the mean of its divisors is an integer number (5811994).

Almost surely, 2^11623987 is an apocalyptic number.

11623987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11623987 is an equidigital number, since it uses as much as digits as its factorization.

11623987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 11623987 is about 3409.3968674826. The cubic root of 11623987 is about 226.5261646082.

The spelling of 11623987 in words is "eleven million, six hundred twenty-three thousand, nine hundred eighty-seven".