68577533 has 2 divisors, whose sum is σ = 68577534. Its totient is φ = 68577532.

The previous prime is 68577527. The next prime is 68577557. The reversal of 68577533 is 33577586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48748324 + 19829209 = 6982^2 + 4453^2 .

It is a cyclic number.

It is not a de Polignac number, because 68577533 - 2⁶ = 68577469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68577563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34288766 + 34288767.

It is an arithmetic number, because the mean of its divisors is an integer number (34288767).

Almost surely, 2^68577533 is an apocalyptic number.

It is an amenable number.

68577533 is a deficient number, since it is larger than the sum of its proper divisors (1).

68577533 is an equidigital number, since it uses as much as digits as its factorization.

68577533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 44.

The square root of 68577533 is about 8281.1552937981. The cubic root of 68577533 is about 409.3177887378.

The spelling of 68577533 in words is "sixty-eight million, five hundred seventy-seven thousand, five hundred thirty-three".