1087355517 has 4 divisors (see below), whose sum is σ = 1449807360. Its totient is φ = 724903676.

The previous prime is 1087355497. The next prime is 1087355531. The reversal of 1087355517 is 7155537801.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7155537801 = 3 ⋅2385179267.

It is a cyclic number.

It is not a de Polignac number, because 1087355517 - 2¹⁴ = 1087339133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087355417) 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, 181225917 + ... + 181225922.

It is an arithmetic number, because the mean of its divisors is an integer number (362451840).

Almost surely, 2^1087355517 is an apocalyptic number.

It is an amenable number.

1087355517 is a deficient number, since it is larger than the sum of its proper divisors (362451843).

1087355517 is an equidigital number, since it uses as much as digits as its factorization.

1087355517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362451842.

The product of its (nonzero) digits is 147000, while the sum is 42.

The square root of 1087355517 is about 32975.0741773237. The cubic root of 1087355517 is about 1028.3095143775.

The spelling of 1087355517 in words is "one billion, eighty-seven million, three hundred fifty-five thousand, five hundred seventeen".