68735475997 has 2 divisors, whose sum is σ = 68735475998. Its totient is φ = 68735475996.

The previous prime is 68735475959. The next prime is 68735476001. The reversal of 68735475997 is 79957453786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45065345796 + 23670130201 = 212286^2 + 153851^2 .

It is a cyclic number.

It is not a de Polignac number, because 68735475997 - 2³¹ = 66587992349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68735275997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34367737998 + 34367737999.

It is an arithmetic number, because the mean of its divisors is an integer number (34367737999).

Almost surely, 2^68735475997 is an apocalyptic number.

It is an amenable number.

68735475997 is a deficient number, since it is larger than the sum of its proper divisors (1).

68735475997 is an equidigital number, since it uses as much as digits as its factorization.

68735475997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400075200, while the sum is 70.

The spelling of 68735475997 in words is "sixty-eight billion, seven hundred thirty-five million, four hundred seventy-five thousand, nine hundred ninety-seven".