1087709 has 4 divisors (see below), whose sum is σ = 1243104. Its totient is φ = 932316.

The previous prime is 1087687. The next prime is 1087717. The reversal of 1087709 is 9077801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1087709 - 2⁸ = 1087453 is a prime.

It is a super-2 number, since 2×1087709² = 2366221737362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087729) 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, 77687 + ... + 77700.

It is an arithmetic number, because the mean of its divisors is an integer number (310776).

2^1087709 is an apocalyptic number.

It is an amenable number.

1087709 is a deficient number, since it is larger than the sum of its proper divisors (155395).

1087709 is an equidigital number, since it uses as much as digits as its factorization.

1087709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155394.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 1087709 is about 1042.9328837466. The cubic root of 1087709 is about 102.8420931648.

The spelling of 1087709 in words is "one million, eighty-seven thousand, seven hundred nine".