1087209785 has 8 divisors (see below), whose sum is σ = 1307149440. Its totient is φ = 868102704.

The previous prime is 1087209769. The next prime is 1087209787. The reversal of 1087209785 is 5879027801.

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 1087209785 - 2⁴ = 1087209769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1087209787) 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, 205265 + ... + 210494.

It is an arithmetic number, because the mean of its divisors is an integer number (163393680).

Almost surely, 2^1087209785 is an apocalyptic number.

It is an amenable number.

1087209785 is a deficient number, since it is larger than the sum of its proper divisors (219939655).

1087209785 is an equidigital number, since it uses as much as digits as its factorization.

1087209785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416287.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 1087209785 is about 32972.8643736027. The cubic root of 1087209785 is about 1028.2635728570.

The spelling of 1087209785 in words is "one billion, eighty-seven million, two hundred nine thousand, seven hundred eighty-five".