7163987 has 8 divisors (see below), whose sum is σ = 7608816. Its totient is φ = 6721792.

The previous prime is 7163983. The next prime is 7163993. The reversal of 7163987 is 7893617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7163987 - 2² = 7163983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7163983) 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 in 7 ways as a sum of consecutive naturals, for example, 10148 + ... + 10830.

It is an arithmetic number, because the mean of its divisors is an integer number (951102).

Almost surely, 2^7163987 is an apocalyptic number.

7163987 is a deficient number, since it is larger than the sum of its proper divisors (444829).

7163987 is a wasteful number, since it uses less digits than its factorization.

7163987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317.

The product of its digits is 63504, while the sum is 41.

The square root of 7163987 is about 2676.5625342966. The cubic root of 7163987 is about 192.7753926429.

The spelling of 7163987 in words is "seven million, one hundred sixty-three thousand, nine hundred eighty-seven".