97878730 has 16 divisors (see below), whose sum is σ = 177800040. Its totient is φ = 38791872.

The previous prime is 97878719. The next prime is 97878733. The reversal of 97878730 is 3787879.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72948681 + 24930049 = 8541^2 + 4993^2 .

It is not an unprimeable number, because it can be changed into a prime (97878733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43809 + ... + 45988.

Almost surely, 2^97878730 is an apocalyptic number.

97878730 is a deficient number, since it is larger than the sum of its proper divisors (79921310).

97878730 is a wasteful number, since it uses less digits than its factorization.

97878730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89913.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 97878730 is about 9893.3679806222. The cubic root of 97878730 is about 460.8533780527.

The spelling of 97878730 in words is "ninety-seven million, eight hundred seventy-eight thousand, seven hundred thirty".