1587979 has 4 divisors (see below), whose sum is σ = 1608160. Its totient is φ = 1567800.

The previous prime is 1587977. The next prime is 1587991. The reversal of 1587979 is 9797851.

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 1587979 - 2¹ = 1587977 is a prime.

It is a Duffinian number.

1587979 is a modest number, since divided by 7979 gives 158 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1587973) 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, 9972 + ... + 10129.

It is an arithmetic number, because the mean of its divisors is an integer number (402040).

2^1587979 is an apocalyptic number.

1587979 is a deficient number, since it is larger than the sum of its proper divisors (20181).

1587979 is an equidigital number, since it uses as much as digits as its factorization.

1587979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20180.

The product of its digits is 158760, while the sum is 46.

The square root of 1587979 is about 1260.1503878506. The cubic root of 1587979 is about 116.6670594091.

The spelling of 1587979 in words is "one million, five hundred eighty-seven thousand, nine hundred seventy-nine".