68997899 has 2 divisors, whose sum is σ = 68997900. Its totient is φ = 68997898.

The previous prime is 68997839. The next prime is 68997919. The reversal of 68997899 is 99879986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68997899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68997839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34498949 + 34498950.

It is an arithmetic number, because the mean of its divisors is an integer number (34498950).

Almost surely, 2^68997899 is an apocalyptic number.

68997899 is a deficient number, since it is larger than the sum of its proper divisors (1).

68997899 is an equidigital number, since it uses as much as digits as its factorization.

68997899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 65.

The square root of 68997899 is about 8306.4973966167. The cubic root of 68997899 is about 410.1524299376.

It can be divided in two parts, 68997 and 899, that added together give a palindrome (69896).

The spelling of 68997899 in words is "sixty-eight million, nine hundred ninety-seven thousand, eight hundred ninety-nine".