68989887 has 12 divisors (see below), whose sum is σ = 103343240. Its totient is φ = 45993096.

The previous prime is 68989861. The next prime is 68989901. The reversal of 68989887 is 78898986.

It is not a de Polignac number, because 68989887 - 2⁸ = 68989631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68989807) 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, 141712 + ... + 142197.

Almost surely, 2^68989887 is an apocalyptic number.

68989887 is a deficient number, since it is larger than the sum of its proper divisors (34353353).

68989887 is an equidigital number, since it uses as much as digits as its factorization.

68989887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283924 (or 283912 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The square root of 68989887 is about 8306.0151095456. The cubic root of 68989887 is about 410.1365537611.

Subtracting 68989887 from its reverse (78898986), we obtain a palindrome (9909099).

The spelling of 68989887 in words is "sixty-eight million, nine hundred eighty-nine thousand, eight hundred eighty-seven".