8971499525 has 6 divisors (see below), whose sum is σ = 11124659442. Its totient is φ = 7177199600.

The previous prime is 8971499521. The next prime is 8971499561. The reversal of 8971499525 is 5259941798.

It is a Cunningham number, because it is equal to 94718²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 8971499524 = 1^2 + 94718^2 .

It is not a de Polignac number, because 8971499525 - 2² = 8971499521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8971499521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179429966 + ... + 179430015.

It is an arithmetic number, because the mean of its divisors is an integer number (1854109907).

Almost surely, 2^8971499525 is an apocalyptic number.

It is an amenable number.

8971499525 is a deficient number, since it is larger than the sum of its proper divisors (2153159917).

8971499525 is a wasteful number, since it uses less digits than its factorization.

8971499525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358859991 (or 358859986 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 59.

The square root of 8971499525 is about 94718.0000052788. Note that the first 5 decimals coincide. The cubic root of 8971499525 is about 2077.8858206347.

The spelling of 8971499525 in words is "eight billion, nine hundred seventy-one million, four hundred ninety-nine thousand, five hundred twenty-five".