97820545 has 8 divisors (see below), whose sum is σ = 118034280. Its totient is φ = 77823360.

The previous prime is 97820543. The next prime is 97820561. The reversal of 97820545 is 54502879.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 97792321 = 168^2 + 9889^2 .

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

It is not a de Polignac number, because 97820545 - 2¹ = 97820543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97820498 and 97820507.

It is not an unprimeable number, because it can be changed into a prime (97820543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53140 + ... + 54949.

It is an arithmetic number, because the mean of its divisors is an integer number (14754285).

Almost surely, 2^97820545 is an apocalyptic number.

It is an amenable number.

97820545 is a deficient number, since it is larger than the sum of its proper divisors (20213735).

97820545 is a wasteful number, since it uses less digits than its factorization.

97820545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108275.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 97820545 is about 9890.4269371954. The cubic root of 97820545 is about 460.7620403025.

The spelling of 97820545 in words is "ninety-seven million, eight hundred twenty thousand, five hundred forty-five".