1084863521 has 4 divisors (see below), whose sum is σ = 1239844032. Its totient is φ = 929883012.

The previous prime is 1084863497. The next prime is 1084863529. The reversal of 1084863521 is 1253684801.

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 a cyclic number.

It is not a de Polignac number, because 1084863521 - 2²² = 1080669217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1084863529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77490245 + ... + 77490258.

It is an arithmetic number, because the mean of its divisors is an integer number (309961008).

Almost surely, 2^1084863521 is an apocalyptic number.

It is an amenable number.

1084863521 is a deficient number, since it is larger than the sum of its proper divisors (154980511).

1084863521 is an equidigital number, since it uses as much as digits as its factorization.

1084863521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154980510.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1084863521 is about 32937.2664469898. The cubic root of 1084863521 is about 1027.5233552784.

The spelling of 1084863521 in words is "one billion, eighty-four million, eight hundred sixty-three thousand, five hundred twenty-one".