97820075409 has 16 divisors (see below), whose sum is σ = 151101071232. Its totient is φ = 55131470208.

The previous prime is 97820075387. The next prime is 97820075429. The reversal of 97820075409 is 90457002879.

It is not a de Polignac number, because 97820075409 - 2⁸ = 97820075153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97820075429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31903254 + ... + 31906319.

It is an arithmetic number, because the mean of its divisors is an integer number (9443816952).

Almost surely, 2^97820075409 is an apocalyptic number.

It is an amenable number.

97820075409 is a deficient number, since it is larger than the sum of its proper divisors (53280995823).

97820075409 is a wasteful number, since it uses less digits than its factorization.

97820075409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63809656.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 97820075409 in words is "ninety-seven billion, eight hundred twenty million, seventy-five thousand, four hundred nine".