97780012 has 12 divisors (see below), whose sum is σ = 186671016. Its totient is φ = 44445440.

The previous prime is 97780009. The next prime is 97780013. The reversal of 97780012 is 21008779.

It is a self number, because there is not a number n which added to its sum of digits gives 97780012.

It is not an unprimeable number, because it can be changed into a prime (97780013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111093 + ... + 1111180.

It is an arithmetic number, because the mean of its divisors is an integer number (15555918).

Almost surely, 2^97780012 is an apocalyptic number.

It is an amenable number.

97780012 is a deficient number, since it is larger than the sum of its proper divisors (88891004).

97780012 is a wasteful number, since it uses less digits than its factorization.

97780012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222288 (or 2222286 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 97780012 is about 9888.3776222392. The cubic root of 97780012 is about 460.6983909334.

The spelling of 97780012 in words is "ninety-seven million, seven hundred eighty thousand, twelve".