70605389 has 4 divisors (see below), whose sum is σ = 70622556. Its totient is φ = 70588224.

The previous prime is 70605373. The next prime is 70605439. The reversal of 70605389 is 98350607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98350607 = 89 ⋅1105063.

It can be written as a sum of positive squares in 2 ways, for example, as 29106025 + 41499364 = 5395^2 + 6442^2 .

It is a cyclic number.

It is not a de Polignac number, because 70605389 - 2⁴ = 70605373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70605329) 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, 1667 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (17655639).

Almost surely, 2^70605389 is an apocalyptic number.

It is an amenable number.

70605389 is a deficient number, since it is larger than the sum of its proper divisors (17167).

70605389 is a wasteful number, since it uses less digits than its factorization.

70605389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17166.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 70605389 is about 8402.7012918466. The cubic root of 70605389 is about 413.3132074112.

The spelling of 70605389 in words is "seventy million, six hundred five thousand, three hundred eighty-nine".