971249109 has 16 divisors (see below), whose sum is σ = 1310400000. Its totient is φ = 639826416.

The previous prime is 971249107. The next prime is 971249113. The reversal of 971249109 is 901942179.

It is not a de Polignac number, because 971249109 - 2¹ = 971249107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971249107) 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, 151042 + ... + 157340.

It is an arithmetic number, because the mean of its divisors is an integer number (81900000).

Almost surely, 2^971249109 is an apocalyptic number.

It is an amenable number.

971249109 is a deficient number, since it is larger than the sum of its proper divisors (339150891).

971249109 is a wasteful number, since it uses less digits than its factorization.

971249109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 971249109 is about 31164.8697895563. The cubic root of 971249109 is about 990.3230279412.

The spelling of 971249109 in words is "nine hundred seventy-one million, two hundred forty-nine thousand, one hundred nine".