1087979 has 4 divisors (see below), whose sum is σ = 1092960. Its totient is φ = 1083000.

The previous prime is 1087973. The next prime is 1087981. The reversal of 1087979 is 9797801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9797801 = 13 ⋅753677.

It is a cyclic number.

It is not a de Polignac number, because 1087979 - 2⁴ = 1087963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087973) 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 3 ways as a sum of consecutive naturals, for example, 2147 + ... + 2604.

It is an arithmetic number, because the mean of its divisors is an integer number (273240).

2^1087979 is an apocalyptic number.

1087979 is a deficient number, since it is larger than the sum of its proper divisors (4981).

1087979 is an equidigital number, since it uses as much as digits as its factorization.

1087979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980.

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

The square root of 1087979 is about 1043.0623183684. The cubic root of 1087979 is about 102.8506018952.

The spelling of 1087979 in words is "one million, eighty-seven thousand, nine hundred seventy-nine".