97981646 has 16 divisors (see below), whose sum is σ = 170096640. Its totient is φ = 41460120.

The previous prime is 97981621. The next prime is 97981657. The reversal of 97981646 is 64618979.

It is a junction number, because it is equal to n+sod(n) for n = 97981594 and 97981603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43190 + ... + 45401.

It is an arithmetic number, because the mean of its divisors is an integer number (10631040).

Almost surely, 2^97981646 is an apocalyptic number.

97981646 is a deficient number, since it is larger than the sum of its proper divisors (72114994).

97981646 is a wasteful number, since it uses less digits than its factorization.

97981646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88679.

The product of its digits is 653184, while the sum is 50.

The square root of 97981646 is about 9898.5678762132. The cubic root of 97981646 is about 461.0148451137.

The spelling of 97981646 in words is "ninety-seven million, nine hundred eighty-one thousand, six hundred forty-six".