68972287 has 2 divisors, whose sum is σ = 68972288. Its totient is φ = 68972286.

The previous prime is 68972269. The next prime is 68972297. The reversal of 68972287 is 78227986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68972287 - 2¹⁹ = 68447999 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68972287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68972207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34486143 + 34486144.

It is an arithmetic number, because the mean of its divisors is an integer number (34486144).

Almost surely, 2^68972287 is an apocalyptic number.

68972287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68972287 is an equidigital number, since it uses as much as digits as its factorization.

68972287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 68972287 is about 8304.9555688155. The cubic root of 68972287 is about 410.1016741695.

The spelling of 68972287 in words is "sixty-eight million, nine hundred seventy-two thousand, two hundred eighty-seven".