1097987 has 4 divisors (see below), whose sum is σ = 1197816. Its totient is φ = 998160.

The previous prime is 1097983. The next prime is 1098017. The reversal of 1097987 is 7897901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1097987 - 2² = 1097983 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1097983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49898 + ... + 49919.

It is an arithmetic number, because the mean of its divisors is an integer number (299454).

2^1097987 is an apocalyptic number.

1097987 is a deficient number, since it is larger than the sum of its proper divisors (99829).

1097987 is an equidigital number, since it uses as much as digits as its factorization.

1097987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99828.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 1097987 is about 1047.8487486274. The cubic root of 1097987 is about 103.1650040084.

The spelling of 1097987 in words is "one million, ninety-seven thousand, nine hundred eighty-seven".