70256729 has 2 divisors, whose sum is σ = 70256730. Its totient is φ = 70256728.

The previous prime is 70256717. The next prime is 70256759. The reversal of 70256729 is 92765207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55472704 + 14784025 = 7448^2 + 3845^2 .

It is an emirp because it is prime and its reverse (92765207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70256729 - 2²⁴ = 53479513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70256692 and 70256701.

It is not a weakly prime, because it can be changed into another prime (70256759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35128364 + 35128365.

It is an arithmetic number, because the mean of its divisors is an integer number (35128365).

Almost surely, 2^70256729 is an apocalyptic number.

It is an amenable number.

70256729 is a deficient number, since it is larger than the sum of its proper divisors (1).

70256729 is an equidigital number, since it uses as much as digits as its factorization.

70256729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 70256729 is about 8381.9287159937. The cubic root of 70256729 is about 412.6317502629.

The spelling of 70256729 in words is "seventy million, two hundred fifty-six thousand, seven hundred twenty-nine".