971648693 has 4 divisors (see below), whose sum is σ = 980247468. Its totient is φ = 963049920.

The previous prime is 971648677. The next prime is 971648701. The reversal of 971648693 is 396846179.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50951044 + 920697649 = 7138^2 + 30343^2 .

It is a cyclic number.

It is not a de Polignac number, because 971648693 - 2⁴ = 971648677 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 (971648653) 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, 4299218 + ... + 4299443.

It is an arithmetic number, because the mean of its divisors is an integer number (245061867).

Almost surely, 2^971648693 is an apocalyptic number.

It is an amenable number.

971648693 is a deficient number, since it is larger than the sum of its proper divisors (8598775).

971648693 is a wasteful number, since it uses less digits than its factorization.

971648693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8598774.

The product of its digits is 1959552, while the sum is 53.

The square root of 971648693 is about 31171.2799384305. The cubic root of 971648693 is about 990.4588197368.

The spelling of 971648693 in words is "nine hundred seventy-one million, six hundred forty-eight thousand, six hundred ninety-three".