68511199 has 2 divisors, whose sum is σ = 68511200. Its totient is φ = 68511198.

The previous prime is 68511133. The next prime is 68511211. The reversal of 68511199 is 99111586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68511199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68511799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34255599 + 34255600.

It is an arithmetic number, because the mean of its divisors is an integer number (34255600).

Almost surely, 2^68511199 is an apocalyptic number.

68511199 is a deficient number, since it is larger than the sum of its proper divisors (1).

68511199 is an equidigital number, since it uses as much as digits as its factorization.

68511199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The square root of 68511199 is about 8277.1492073056. The cubic root of 68511199 is about 409.1857705477.

The spelling of 68511199 in words is "sixty-eight million, five hundred eleven thousand, one hundred ninety-nine".