1087633009 has 4 divisors (see below), whose sum is σ = 1087720816. Its totient is φ = 1087545204.

The previous prime is 1087633003. The next prime is 1087633031. The reversal of 1087633009 is 9003367801.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9003367801 = 49199 ⋅182999.

It is a cyclic number.

It is not a de Polignac number, because 1087633009 - 2¹⁷ = 1087501937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087633003) 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, 21519 + ... + 51364.

It is an arithmetic number, because the mean of its divisors is an integer number (271930204).

Almost surely, 2^1087633009 is an apocalyptic number.

It is an amenable number.

1087633009 is a deficient number, since it is larger than the sum of its proper divisors (87807).

1087633009 is an equidigital number, since it uses as much as digits as its factorization.

1087633009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87806.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1087633009 is about 32979.2815112761. The cubic root of 1087633009 is about 1028.3969814446.

The spelling of 1087633009 in words is "one billion, eighty-seven million, six hundred thirty-three thousand, nine".