68989936087 has 2 divisors, whose sum is σ = 68989936088. Its totient is φ = 68989936086.

The previous prime is 68989936049. The next prime is 68989936121. The reversal of 68989936087 is 78063998986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68989936087 - 2²⁷ = 68855718359 is a prime.

It is a super-2 number, since 2×68989936087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68989936387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34494968043 + 34494968044.

It is an arithmetic number, because the mean of its divisors is an integer number (34494968044).

Almost surely, 2^68989936087 is an apocalyptic number.

68989936087 is a deficient number, since it is larger than the sum of its proper divisors (1).

68989936087 is an equidigital number, since it uses as much as digits as its factorization.

68989936087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282175488, while the sum is 73.

The spelling of 68989936087 in words is "sixty-eight billion, nine hundred eighty-nine million, nine hundred thirty-six thousand, eighty-seven".