97780055 has 8 divisors (see below), whose sum is σ = 117452832. Its totient is φ = 78146208.

The previous prime is 97780049. The next prime is 97780057. The reversal of 97780055 is 55008779.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 97780055 - 2⁶ = 97779991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97779994 and 97780021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97780057) 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, 3884 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (14681604).

Almost surely, 2^97780055 is an apocalyptic number.

97780055 is a deficient number, since it is larger than the sum of its proper divisors (19672777).

97780055 is a wasteful number, since it uses less digits than its factorization.

97780055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19465.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 97780055 is about 9888.3797965086. The cubic root of 97780055 is about 460.6984584660.

The spelling of 97780055 in words is "ninety-seven million, seven hundred eighty thousand, fifty-five".