97820015 has 8 divisors (see below), whose sum is σ = 118546848. Its totient is φ = 77480800.

The previous prime is 97820011. The next prime is 97820039. The reversal of 97820015 is 51002879.

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

It is not a de Polignac number, because 97820015 - 2² = 97820011 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 (97820011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96347 + ... + 97356.

It is an arithmetic number, because the mean of its divisors is an integer number (14818356).

Almost surely, 2^97820015 is an apocalyptic number.

97820015 is a deficient number, since it is larger than the sum of its proper divisors (20726833).

97820015 is a wasteful number, since it uses less digits than its factorization.

97820015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193809.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 97820015 is about 9890.4001435736. The cubic root of 97820015 is about 460.7612081517.

The spelling of 97820015 in words is "ninety-seven million, eight hundred twenty thousand, fifteen".