68121523 has 2 divisors, whose sum is σ = 68121524. Its totient is φ = 68121522.

The previous prime is 68121497. The next prime is 68121527. The reversal of 68121523 is 32512186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68121523 - 2¹⁷ = 67990451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68121491 and 68121500.

It is not a weakly prime, because it can be changed into another prime (68121527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34060761 + 34060762.

It is an arithmetic number, because the mean of its divisors is an integer number (34060762).

Almost surely, 2^68121523 is an apocalyptic number.

68121523 is a deficient number, since it is larger than the sum of its proper divisors (1).

68121523 is an equidigital number, since it uses as much as digits as its factorization.

68121523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 68121523 is about 8253.5763763353. The cubic root of 68121523 is about 408.4085100885.

It can be divided in two parts, 68121 and 523, that added together give a square (68644 = 262²).

The spelling of 68121523 in words is "sixty-eight million, one hundred twenty-one thousand, five hundred twenty-three".