77427345 has 16 divisors (see below), whose sum is σ = 124580160. Its totient is φ = 41062464.

The previous prime is 77427341. The next prime is 77427353. The reversal of 77427345 is 54372477.

It is not a de Polignac number, because 77427345 - 2² = 77427341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77427341) 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 15 ways as a sum of consecutive naturals, for example, 11734 + ... + 17103.

It is an arithmetic number, because the mean of its divisors is an integer number (7786260).

It is the magic constant of a 537 × 537 magic square.

Almost surely, 2^77427345 is an apocalyptic number.

It is an amenable number.

77427345 is a deficient number, since it is larger than the sum of its proper divisors (47152815).

77427345 is a wasteful number, since it uses less digits than its factorization.

77427345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29024.

The product of its digits is 164640, while the sum is 39.

The square root of 77427345 is about 8799.2809365311. The cubic root of 77427345 is about 426.2176751286.

The spelling of 77427345 in words is "seventy-seven million, four hundred twenty-seven thousand, three hundred forty-five".