70729 has 2 divisors, whose sum is σ = 70730. Its totient is φ = 70728.

The previous prime is 70717. The next prime is 70753. The reversal of 70729 is 92707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 7225 = 252^2 + 85^2 .

It is an emirp because it is prime and its reverse (92707) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70729 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (70709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35364 + 35365.

It is an arithmetic number, because the mean of its divisors is an integer number (35365).

2⁷⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

70729 is a deficient number, since it is larger than the sum of its proper divisors (1).

70729 is an equidigital number, since it uses as much as digits as its factorization.

70729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 70729 is about 265.9492432777. The cubic root of 70729 is about 41.3554266786.

It can be divided in two parts, 707 and 29, that multiplied together give a triangular number (20503 = T₂₀₂).

The spelling of 70729 in words is "seventy thousand, seven hundred twenty-nine".