68090999 has 2 divisors, whose sum is σ = 68091000. Its totient is φ = 68090998.

The previous prime is 68090977. The next prime is 68091007. The reversal of 68090999 is 99909086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68090999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68020999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34045499 + 34045500.

It is an arithmetic number, because the mean of its divisors is an integer number (34045500).

Almost surely, 2^68090999 is an apocalyptic number.

68090999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68090999 is an equidigital number, since it uses as much as digits as its factorization.

68090999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 68090999 is about 8251.7270313553. The cubic root of 68090999 is about 408.3475008644.

The spelling of 68090999 in words is "sixty-eight million, ninety thousand, nine hundred ninety-nine".