9145987 has 2 divisors, whose sum is σ = 9145988. Its totient is φ = 9145986.

The previous prime is 9145967. The next prime is 9146009. The reversal of 9145987 is 7895419.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145987 is a prime.

It is not a weakly prime, because it can be changed into another prime (9145937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572993 + 4572994.

It is an arithmetic number, because the mean of its divisors is an integer number (4572994).

Almost surely, 2^9145987 is an apocalyptic number.

9145987 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145987 is an equidigital number, since it uses as much as digits as its factorization.

9145987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 9145987 is about 3024.2332912657. The cubic root of 9145987 is about 209.1270413413.

The spelling of 9145987 in words is "nine million, one hundred forty-five thousand, nine hundred eighty-seven".