971297501 has 4 divisors (see below), whose sum is σ = 971759292. Its totient is φ = 970835712.

The previous prime is 971297479. The next prime is 971297513. The reversal of 971297501 is 105792179.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105792179 = 3881 ⋅27259.

It can be written as a sum of positive squares in 2 ways, for example, as 70997476 + 900300025 = 8426^2 + 30005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971297501 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 (971291501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227726 + ... + 231951.

It is an arithmetic number, because the mean of its divisors is an integer number (242939823).

Almost surely, 2^971297501 is an apocalyptic number.

It is an amenable number.

971297501 is a deficient number, since it is larger than the sum of its proper divisors (461791).

971297501 is a wasteful number, since it uses less digits than its factorization.

971297501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461790.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 971297501 is about 31165.6461668934. The cubic root of 971297501 is about 990.3394751175.

The spelling of 971297501 in words is "nine hundred seventy-one million, two hundred ninety-seven thousand, five hundred one".