863520641 has 4 divisors (see below), whose sum is σ = 865294272. Its totient is φ = 861747012.

The previous prime is 863520599. The next prime is 863520653. The reversal of 863520641 is 146025368.

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 863520641 - 2¹⁰ = 863519617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863520241) 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, 886085 + ... + 887058.

It is an arithmetic number, because the mean of its divisors is an integer number (216323568).

Almost surely, 2^863520641 is an apocalyptic number.

It is an amenable number.

863520641 is a deficient number, since it is larger than the sum of its proper divisors (1773631).

863520641 is a wasteful number, since it uses less digits than its factorization.

863520641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773630.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 863520641 is about 29385.7217199102. The cubic root of 863520641 is about 952.2644562388.

The spelling of 863520641 in words is "eight hundred sixty-three million, five hundred twenty thousand, six hundred forty-one".