67981253 has 2 divisors, whose sum is σ = 67981254. Its totient is φ = 67981252.

The previous prime is 67981217. The next prime is 67981313. The reversal of 67981253 is 35218976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64529089 + 3452164 = 8033^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 67981253 - 2¹² = 67977157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67981253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67981213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33990626 + 33990627.

It is an arithmetic number, because the mean of its divisors is an integer number (33990627).

Almost surely, 2^67981253 is an apocalyptic number.

It is an amenable number.

67981253 is a deficient number, since it is larger than the sum of its proper divisors (1).

67981253 is an equidigital number, since it uses as much as digits as its factorization.

67981253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 67981253 is about 8245.0744690391. The cubic root of 67981253 is about 408.1279975343.

The spelling of 67981253 in words is "sixty-seven million, nine hundred eighty-one thousand, two hundred fifty-three".