97820530 has 16 divisors (see below), whose sum is σ = 176514840. Its totient is φ = 39030912.

The previous prime is 97820521. The next prime is 97820537. The reversal of 97820530 is 3502879.

It can be written as a sum of positive squares in 4 ways, for example, as 95238081 + 2582449 = 9759^2 + 1607^2 .

It is not an unprimeable number, because it can be changed into a prime (97820537) 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, 7869 + ... + 16048.

Almost surely, 2^97820530 is an apocalyptic number.

97820530 is a deficient number, since it is larger than the sum of its proper divisors (78694310).

97820530 is a wasteful number, since it uses less digits than its factorization.

97820530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24333.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 97820530 is about 9890.4261788863. The cubic root of 97820530 is about 460.7620167511.

The spelling of 97820530 in words is "ninety-seven million, eight hundred twenty thousand, five hundred thirty".