971529681 has 32 divisors (see below), whose sum is σ = 1340172288. Its totient is φ = 625806720.

The previous prime is 971529619. The next prime is 971529709. The reversal of 971529681 is 186925179.

It is not a de Polignac number, because 971529681 - 2¹⁵ = 971496913 is a prime.

It is a super-2 number, since 2×971529681² = 1887739842127923522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 971529681.

It is not an unprimeable number, because it can be changed into a prime (971529781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3457261 + ... + 3457541.

It is an arithmetic number, because the mean of its divisors is an integer number (41880384).

Almost surely, 2^971529681 is an apocalyptic number.

It is an amenable number.

971529681 is a deficient number, since it is larger than the sum of its proper divisors (368642607).

971529681 is a wasteful number, since it uses less digits than its factorization.

971529681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its digits is 272160, while the sum is 48.

The square root of 971529681 is about 31169.3708791179. The cubic root of 971529681 is about 990.4183794354.

The spelling of 971529681 in words is "nine hundred seventy-one million, five hundred twenty-nine thousand, six hundred eighty-one".