863621641 has 8 divisors (see below), whose sum is σ = 954180864. Its totient is φ = 777480000.

The previous prime is 863621639. The next prime is 863621657. The reversal of 863621641 is 146126368.

It is a happy number.

863621641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 863621641 - 2¹ = 863621639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863621641.

It is not an unprimeable number, because it can be changed into a prime (863621621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103985 + ... + 1104766.

It is an arithmetic number, because the mean of its divisors is an integer number (119272608).

Almost surely, 2^863621641 is an apocalyptic number.

It is an amenable number.

863621641 is a deficient number, since it is larger than the sum of its proper divisors (90559223).

863621641 is a wasteful number, since it uses less digits than its factorization.

863621641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208791.

The product of its digits is 41472, while the sum is 37.

The square root of 863621641 is about 29387.4401913471. The cubic root of 863621641 is about 952.3015813736.

The spelling of 863621641 in words is "eight hundred sixty-three million, six hundred twenty-one thousand, six hundred forty-one".