97821706 has 8 divisors (see below), whose sum is σ = 155363940. Its totient is φ = 46033728.

The previous prime is 97821697. The next prime is 97821721. The reversal of 97821706 is 60712879.

It can be written as a sum of positive squares in 2 ways, for example, as 85396081 + 12425625 = 9241^2 + 3525^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438521 + ... + 1438588.

Almost surely, 2^97821706 is an apocalyptic number.

97821706 is a deficient number, since it is larger than the sum of its proper divisors (57542234).

97821706 is a wasteful number, since it uses less digits than its factorization.

97821706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877128.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 97821706 is about 9890.4856301397. The cubic root of 97821706 is about 460.7638631731.

The spelling of 97821706 in words is "ninety-seven million, eight hundred twenty-one thousand, seven hundred six".