11401987 has 2 divisors, whose sum is σ = 11401988. Its totient is φ = 11401986.

The previous prime is 11401981. The next prime is 11402003. The reversal of 11401987 is 78910411.

It is a weak prime.

It is an emirp because it is prime and its reverse (78910411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11401987 - 2¹¹ = 11399939 is a prime.

It is not a weakly prime, because it can be changed into another prime (11401981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5700993 + 5700994.

It is an arithmetic number, because the mean of its divisors is an integer number (5700994).

Almost surely, 2^11401987 is an apocalyptic number.

11401987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11401987 is an equidigital number, since it uses as much as digits as its factorization.

11401987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 11401987 is about 3376.6828397112. The cubic root of 11401987 is about 225.0747866619.

The spelling of 11401987 in words is "eleven million, four hundred one thousand, nine hundred eighty-seven".