861730563 has 8 divisors (see below), whose sum is σ = 1188594000. Its totient is φ = 554677088.

The previous prime is 861730547. The next prime is 861730567. The reversal of 861730563 is 365037168.

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 861730563 - 2⁴ = 861730547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861730567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4952388 + ... + 4952561.

It is an arithmetic number, because the mean of its divisors is an integer number (148574250).

Almost surely, 2^861730563 is an apocalyptic number.

861730563 is a deficient number, since it is larger than the sum of its proper divisors (326863437).

861730563 is a wasteful number, since it uses less digits than its factorization.

861730563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9904981.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 861730563 is about 29355.2476228697. The cubic root of 861730563 is about 951.6059863933.

The spelling of 861730563 in words is "eight hundred sixty-one million, seven hundred thirty thousand, five hundred sixty-three".