971272643 has 8 divisors (see below), whose sum is σ = 1060297776. Its totient is φ = 882368800.

The previous prime is 971272639. The next prime is 971272663. The reversal of 971272643 is 346272179.

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 971272643 - 2² = 971272639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971272643.

It is not an unprimeable number, because it can be changed into a prime (971272613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13148 + ... + 45993.

It is an arithmetic number, because the mean of its divisors is an integer number (132537222).

Almost surely, 2^971272643 is an apocalyptic number.

971272643 is a deficient number, since it is larger than the sum of its proper divisors (89025133).

971272643 is a wasteful number, since it uses less digits than its factorization.

971272643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60645.

The product of its digits is 127008, while the sum is 41.

The square root of 971272643 is about 31165.2473598398. The cubic root of 971272643 is about 990.3310266011.

The spelling of 971272643 in words is "nine hundred seventy-one million, two hundred seventy-two thousand, six hundred forty-three".