70129889 has 4 divisors (see below), whose sum is σ = 70641924. Its totient is φ = 69617856.

The previous prime is 70129883. The next prime is 70129897. The reversal of 70129889 is 98892107.

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 54982225 + 15147664 = 7415^2 + 3892^2 .

It is a cyclic number.

It is not a de Polignac number, because 70129889 - 2¹² = 70125793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70129883) 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, 255812 + ... + 256085.

It is an arithmetic number, because the mean of its divisors is an integer number (17660481).

Almost surely, 2^70129889 is an apocalyptic number.

It is an amenable number.

70129889 is a deficient number, since it is larger than the sum of its proper divisors (512035).

70129889 is a wasteful number, since it uses less digits than its factorization.

70129889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512034.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 70129889 is about 8374.3590202475. The cubic root of 70129889 is about 412.3832818228.

The spelling of 70129889 in words is "seventy million, one hundred twenty-nine thousand, eight hundred eighty-nine".