868153887 has 12 divisors (see below), whose sum is σ = 1271179104. Its totient is φ = 570840480.

The previous prime is 868153879. The next prime is 868153901. The reversal of 868153887 is 788351868.

It is a happy number.

It is not a de Polignac number, because 868153887 - 2³ = 868153879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868153087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660039 + ... + 661352.

It is an arithmetic number, because the mean of its divisors is an integer number (105931592).

Almost surely, 2^868153887 is an apocalyptic number.

868153887 is a deficient number, since it is larger than the sum of its proper divisors (403025217).

868153887 is a wasteful number, since it uses less digits than its factorization.

868153887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321470 (or 1321467 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 868153887 is about 29464.4512421324. The cubic root of 868153887 is about 953.9645537507.

The spelling of 868153887 in words is "eight hundred sixty-eight million, one hundred fifty-three thousand, eight hundred eighty-seven".