868990641 has 8 divisors (see below), whose sum is σ = 1158871104. Its totient is φ = 579218640.

The previous prime is 868990627. The next prime is 868990657. The reversal of 868990641 is 146099868.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 868990641 - 2¹⁰ = 868989617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (868990541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6090 + ... + 42131.

It is an arithmetic number, because the mean of its divisors is an integer number (144858888).

Almost surely, 2^868990641 is an apocalyptic number.

It is an amenable number.

868990641 is a deficient number, since it is larger than the sum of its proper divisors (289880463).

868990641 is a wasteful number, since it uses less digits than its factorization.

868990641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54231.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 868990641 is about 29478.6472043749. The cubic root of 868990641 is about 954.2709423419.

The spelling of 868990641 in words is "eight hundred sixty-eight million, nine hundred ninety thousand, six hundred forty-one".