868154887 has 2 divisors, whose sum is σ = 868154888. Its totient is φ = 868154886.

The previous prime is 868154863. The next prime is 868154891. The reversal of 868154887 is 788451868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868154887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868154857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434077443 + 434077444.

It is an arithmetic number, because the mean of its divisors is an integer number (434077444).

Almost surely, 2^868154887 is an apocalyptic number.

868154887 is a deficient number, since it is larger than the sum of its proper divisors (1).

868154887 is an equidigital number, since it uses as much as digits as its factorization.

868154887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3440640, while the sum is 55.

The square root of 868154887 is about 29464.4682117292. The cubic root of 868154887 is about 953.9649200315.

The spelling of 868154887 in words is "eight hundred sixty-eight million, one hundred fifty-four thousand, eight hundred eighty-seven".