68406529 has 2 divisors, whose sum is σ = 68406530. Its totient is φ = 68406528.

The previous prime is 68406511. The next prime is 68406551. The reversal of 68406529 is 92560486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 178929 = 8260^2 + 423^2 .

It is a cyclic number.

It is not a de Polignac number, because 68406529 - 2⁹ = 68406017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68406491 and 68406500.

It is not a weakly prime, because it can be changed into another prime (68406029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34203264 + 34203265.

It is an arithmetic number, because the mean of its divisors is an integer number (34203265).

Almost surely, 2^68406529 is an apocalyptic number.

It is an amenable number.

68406529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68406529 is an equidigital number, since it uses as much as digits as its factorization.

68406529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 68406529 is about 8270.8239613717. The cubic root of 68406529 is about 408.9772824704.

The spelling of 68406529 in words is "sixty-eight million, four hundred six thousand, five hundred twenty-nine".