971898909 has 16 divisors (see below), whose sum is σ = 1323843840. Its totient is φ = 634052160.

The previous prime is 971898881. The next prime is 971898913. The reversal of 971898909 is 909898179.

It is not a de Polignac number, because 971898909 - 2⁹ = 971898397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971898919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22572 + ... + 49530.

It is an arithmetic number, because the mean of its divisors is an integer number (82740240).

Almost surely, 2^971898909 is an apocalyptic number.

It is an amenable number.

971898909 is a deficient number, since it is larger than the sum of its proper divisors (351944931).

971898909 is a wasteful number, since it uses less digits than its factorization.

971898909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27220.

The product of its (nonzero) digits is 2939328, while the sum is 60.

The square root of 971898909 is about 31175.2932464155. The cubic root of 971898909 is about 990.5438324153.

The spelling of 971898909 in words is "nine hundred seventy-one million, eight hundred ninety-eight thousand, nine hundred nine".