70129817 has 4 divisors (see below), whose sum is σ = 73820880. Its totient is φ = 66438756.

The previous prime is 70129799. The next prime is 70129847. The reversal of 70129817 is 71892107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71892107 = 7 ⋅10270301.

It is a cyclic number.

It is not a de Polignac number, because 70129817 - 2¹⁸ = 69867673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70129847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845503 + ... + 1845540.

It is an arithmetic number, because the mean of its divisors is an integer number (18455220).

Almost surely, 2^70129817 is an apocalyptic number.

It is an amenable number.

70129817 is a deficient number, since it is larger than the sum of its proper divisors (3691063).

70129817 is a wasteful number, since it uses less digits than its factorization.

70129817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691062.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 70129817 is about 8374.3547214099. The cubic root of 70129817 is about 412.3831406960.

The spelling of 70129817 in words is "seventy million, one hundred twenty-nine thousand, eight hundred seventeen".