971640654 has 8 divisors (see below), whose sum is σ = 1943281320. Its totient is φ = 323880216.

The previous prime is 971640653. The next prime is 971640689. The reversal of 971640654 is 456046179.

It is a sphenic number, since it is the product of 3 distinct primes.

971640654 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971640653) 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 3 ways as a sum of consecutive naturals, for example, 80970049 + ... + 80970060.

It is an arithmetic number, because the mean of its divisors is an integer number (242910165).

Almost surely, 2^971640654 is an apocalyptic number.

971640654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971640654 is a wasteful number, since it uses less digits than its factorization.

971640654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161940114.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 971640654 is about 31171.1509893363. The cubic root of 971640654 is about 990.4560881870.

The spelling of 971640654 in words is "nine hundred seventy-one million, six hundred forty thousand, six hundred fifty-four".