77430055 has 8 divisors (see below), whose sum is σ = 92970144. Its totient is φ = 61908000.

The previous prime is 77430049. The next prime is 77430077. The reversal of 77430055 is 55003477.

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

It is not a de Polignac number, because 77430055 - 2³ = 77430047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77429999 and 77430026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8205 + ... + 14905.

It is an arithmetic number, because the mean of its divisors is an integer number (11621268).

Almost surely, 2^77430055 is an apocalyptic number.

77430055 is a deficient number, since it is larger than the sum of its proper divisors (15540089).

77430055 is a wasteful number, since it uses less digits than its factorization.

77430055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 77430055 is about 8799.4349250392. The cubic root of 77430055 is about 426.2226476889. Note that the first 3 decimals are identical.

The spelling of 77430055 in words is "seventy-seven million, four hundred thirty thousand, fifty-five".