68470729 has 2 divisors, whose sum is σ = 68470730. Its totient is φ = 68470728.

The previous prime is 68470709. The next prime is 68470733. The reversal of 68470729 is 92707486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66585600 + 1885129 = 8160^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 68470729 - 2¹⁵ = 68437961 is a prime.

It is not a weakly prime, because it can be changed into another prime (68470709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34235364 + 34235365.

It is an arithmetic number, because the mean of its divisors is an integer number (34235365).

Almost surely, 2^68470729 is an apocalyptic number.

It is an amenable number.

68470729 is a deficient number, since it is larger than the sum of its proper divisors (1).

68470729 is an equidigital number, since it uses as much as digits as its factorization.

68470729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 68470729 is about 8274.7041638961. The cubic root of 68470729 is about 409.1051851344.

The spelling of 68470729 in words is "sixty-eight million, four hundred seventy thousand, seven hundred twenty-nine".