68890999 has 2 divisors, whose sum is σ = 68891000. Its totient is φ = 68890998.

The previous prime is 68890967. The next prime is 68891027. The reversal of 68890999 is 99909886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68890999 - 2⁵ = 68890967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68890949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34445499 + 34445500.

It is an arithmetic number, because the mean of its divisors is an integer number (34445500).

Almost surely, 2^68890999 is an apocalyptic number.

68890999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68890999 is an equidigital number, since it uses as much as digits as its factorization.

68890999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 58.

The square root of 68890999 is about 8300.0601805047. The cubic root of 68890999 is about 409.9405009832.

The spelling of 68890999 in words is "sixty-eight million, eight hundred ninety thousand, nine hundred ninety-nine".