34157729 has 2 divisors, whose sum is σ = 34157730. Its totient is φ = 34157728.

The previous prime is 34157723. The next prime is 34157749. The reversal of 34157729 is 92775143.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30547729 + 3610000 = 5527^2 + 1900^2 .

It is an emirp because it is prime and its reverse (92775143) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34157729 - 2²⁴ = 17380513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 34157692 and 34157701.

It is not a weakly prime, because it can be changed into another prime (34157723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17078864 + 17078865.

It is an arithmetic number, because the mean of its divisors is an integer number (17078865).

Almost surely, 2^34157729 is an apocalyptic number.

It is an amenable number.

34157729 is a deficient number, since it is larger than the sum of its proper divisors (1).

34157729 is an equidigital number, since it uses as much as digits as its factorization.

34157729 is an odious number, because the sum of its binary digits is odd.

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

The square root of 34157729 is about 5844.4613952014. The cubic root of 34157729 is about 324.4613689497.

The spelling of 34157729 in words is "thirty-four million, one hundred fifty-seven thousand, seven hundred twenty-nine".