14431987 has 2 divisors, whose sum is σ = 14431988. Its totient is φ = 14431986.

The previous prime is 14431969. The next prime is 14431999. The reversal of 14431987 is 78913441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14431987 - 2²³ = 6043379 is a prime.

It is not a weakly prime, because it can be changed into another prime (14431687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215993 + 7215994.

It is an arithmetic number, because the mean of its divisors is an integer number (7215994).

Almost surely, 2^14431987 is an apocalyptic number.

14431987 is a deficient number, since it is larger than the sum of its proper divisors (1).

14431987 is an equidigital number, since it uses as much as digits as its factorization.

14431987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 14431987 is about 3798.9455115861. The cubic root of 14431987 is about 243.4680867851.

It can be divided in two parts, 144 and 31987, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 14431987 in words is "fourteen million, four hundred thirty-one thousand, nine hundred eighty-seven".