97630821 has 6 divisors (see below), whose sum is σ = 141022310. Its totient is φ = 65087208.

The previous prime is 97630817. The next prime is 97630829. The reversal of 97630821 is 12803679.

It can be written as a sum of positive squares in only one way, i.e., 97121025 + 509796 = 9855^2 + 714^2 .

It is not a de Polignac number, because 97630821 - 2² = 97630817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97630829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5423926 + ... + 5423943.

Almost surely, 2^97630821 is an apocalyptic number.

It is an amenable number.

97630821 is a deficient number, since it is larger than the sum of its proper divisors (43391489).

97630821 is a wasteful number, since it uses less digits than its factorization.

97630821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10847875 (or 10847872 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 97630821 is about 9880.8309873209. The cubic root of 97630821 is about 460.4639631991.

The spelling of 97630821 in words is "ninety-seven million, six hundred thirty thousand, eight hundred twenty-one".