971997503 has 8 divisors (see below), whose sum is σ = 1015141248. Its totient is φ = 928927384.

The previous prime is 971997473. The next prime is 971997527. The reversal of 971997503 is 305799179.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 971997503 - 2¹⁰ = 971996479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971997563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9500 + ... + 45102.

It is an arithmetic number, because the mean of its divisors is an integer number (126892656).

Almost surely, 2^971997503 is an apocalyptic number.

971997503 is a deficient number, since it is larger than the sum of its proper divisors (43143745).

971997503 is a wasteful number, since it uses less digits than its factorization.

971997503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36813.

The product of its (nonzero) digits is 535815, while the sum is 50.

The square root of 971997503 is about 31176.8744905579. The cubic root of 971997503 is about 990.5773264257.

The spelling of 971997503 in words is "nine hundred seventy-one million, nine hundred ninety-seven thousand, five hundred three".