70216129 has 4 divisors (see below), whose sum is σ = 70241220. Its totient is φ = 70191040.

The previous prime is 70216127. The next prime is 70216169. The reversal of 70216129 is 92161207.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14265729 + 55950400 = 3777^2 + 7480^2 .

It is a cyclic number.

It is not a de Polignac number, because 70216129 - 2¹ = 70216127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70216097 and 70216106.

It is not an unprimeable number, because it can be changed into a prime (70216123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7732 + ... + 14149.

It is an arithmetic number, because the mean of its divisors is an integer number (17560305).

Almost surely, 2^70216129 is an apocalyptic number.

It is an amenable number.

70216129 is a deficient number, since it is larger than the sum of its proper divisors (25091).

70216129 is a wasteful number, since it uses less digits than its factorization.

70216129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25090.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 70216129 is about 8379.5064890481. The cubic root of 70216129 is about 412.5522509875.

The spelling of 70216129 in words is "seventy million, two hundred sixteen thousand, one hundred twenty-nine".