68140253 has 2 divisors, whose sum is σ = 68140254. Its totient is φ = 68140252.

The previous prime is 68140249. The next prime is 68140291. The reversal of 68140253 is 35204186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43270084 + 24870169 = 6578^2 + 4987^2 .

It is a cyclic number.

It is not a de Polignac number, because 68140253 - 2² = 68140249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68140153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34070126 + 34070127.

It is an arithmetic number, because the mean of its divisors is an integer number (34070127).

Almost surely, 2^68140253 is an apocalyptic number.

It is an amenable number.

68140253 is a deficient number, since it is larger than the sum of its proper divisors (1).

68140253 is an equidigital number, since it uses as much as digits as its factorization.

68140253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 68140253 is about 8254.7109579924. The cubic root of 68140253 is about 408.4459372730.

The spelling of 68140253 in words is "sixty-eight million, one hundred forty thousand, two hundred fifty-three".