971648385 has 16 divisors (see below), whose sum is σ = 1559049984. Its totient is φ = 516741632.

The previous prime is 971648383. The next prime is 971648387. The reversal of 971648385 is 583846179.

971648385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (971648383) and next prime (971648387).

It is a cyclic number.

It is not a de Polignac number, because 971648385 - 2¹ = 971648383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (971648383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86457 + ... + 97046.

It is an arithmetic number, because the mean of its divisors is an integer number (97440624).

Almost surely, 2^971648385 is an apocalyptic number.

It is an amenable number.

971648385 is a deficient number, since it is larger than the sum of its proper divisors (587401599).

971648385 is a wasteful number, since it uses less digits than its factorization.

971648385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183864.

The product of its digits is 1451520, while the sum is 51.

The square root of 971648385 is about 31171.2749979849. The cubic root of 971648385 is about 990.4587150826.

The spelling of 971648385 in words is "nine hundred seventy-one million, six hundred forty-eight thousand, three hundred eighty-five".