870420029 has 2 divisors, whose sum is σ = 870420030. Its totient is φ = 870420028.

The previous prime is 870420017. The next prime is 870420053. The reversal of 870420029 is 920024078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438902500 + 431517529 = 20950^2 + 20773^2 .

It is a cyclic number.

It is not a de Polignac number, because 870420029 - 2⁴ = 870420013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870419977 and 870420004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870422029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435210014 + 435210015.

It is an arithmetic number, because the mean of its divisors is an integer number (435210015).

Almost surely, 2^870420029 is an apocalyptic number.

It is an amenable number.

870420029 is a deficient number, since it is larger than the sum of its proper divisors (1).

870420029 is an equidigital number, since it uses as much as digits as its factorization.

870420029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 870420029 is about 29502.8817067079. The cubic root of 870420029 is about 954.7938770993.

The spelling of 870420029 in words is "eight hundred seventy million, four hundred twenty thousand, twenty-nine".