9213989705 has 8 divisors (see below), whose sum is σ = 11057312904. Its totient is φ = 7370841600.

The previous prime is 9213989689. The next prime is 9213989731. The reversal of 9213989705 is 5079893129.

It can be written as a sum of positive squares in 4 ways, for example, as 1866585616 + 7347404089 = 43204^2 + 85717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9213989705 - 2⁴ = 9213989689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149945 + ... + 202265.

It is an arithmetic number, because the mean of its divisors is an integer number (1382164113).

Almost surely, 2^9213989705 is an apocalyptic number.

It is an amenable number.

9213989705 is a deficient number, since it is larger than the sum of its proper divisors (1843323199).

9213989705 is a wasteful number, since it uses less digits than its factorization.

9213989705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87547.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 9213989705 is about 95989.5291425060. The cubic root of 9213989705 is about 2096.4406603197.

The spelling of 9213989705 in words is "nine billion, two hundred thirteen million, nine hundred eighty-nine thousand, seven hundred five".