97785078 has 16 divisors (see below), whose sum is σ = 195689520. Its totient is φ = 32575136.

The previous prime is 97785073. The next prime is 97785089. The reversal of 97785078 is 87058779.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 97785078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97785073) 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, 8476 + ... + 16352.

It is an arithmetic number, because the mean of its divisors is an integer number (12230595).

Almost surely, 2^97785078 is an apocalyptic number.

97785078 is an abundant number, since it is smaller than the sum of its proper divisors (97904442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97785078 is a wasteful number, since it uses less digits than its factorization.

97785078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951.

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 97785078 is about 9888.6337782325. The cubic root of 97785078 is about 460.7063470848.

The spelling of 97785078 in words is "ninety-seven million, seven hundred eighty-five thousand, seventy-eight".