1988147 has 8 divisors (see below), whose sum is σ = 2320896. Its totient is φ = 1667592.

The previous prime is 1988137. The next prime is 1988177. The reversal of 1988147 is 7418891.

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 1988147 - 2⁸ = 1987891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1988147.

It is not an unprimeable number, because it can be changed into a prime (1988137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2693 + ... + 3350.

It is an arithmetic number, because the mean of its divisors is an integer number (290112).

2^1988147 is an apocalyptic number.

1988147 is a deficient number, since it is larger than the sum of its proper divisors (332749).

1988147 is an equidigital number, since it uses as much as digits as its factorization.

1988147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097.

The product of its digits is 16128, while the sum is 38.

The square root of 1988147 is about 1410.0166665682. The cubic root of 1988147 is about 125.7427142639.

The spelling of 1988147 in words is "one million, nine hundred eighty-eight thousand, one hundred forty-seven".