77427743 has 4 divisors (see below), whose sum is σ = 77447280. Its totient is φ = 77408208.

The previous prime is 77427737. The next prime is 77427751. The reversal of 77427743 is 34772477.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77427743 - 2¹⁴ = 77411359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77427743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77427733) 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, 1478 + ... + 12531.

It is an arithmetic number, because the mean of its divisors is an integer number (19361820).

Almost surely, 2^77427743 is an apocalyptic number.

77427743 is a deficient number, since it is larger than the sum of its proper divisors (19537).

77427743 is a wasteful number, since it uses less digits than its factorization.

77427743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19536.

The product of its digits is 230496, while the sum is 41.

The square root of 77427743 is about 8799.3035519864. The cubic root of 77427743 is about 426.2184054233.

The spelling of 77427743 in words is "seventy-seven million, four hundred twenty-seven thousand, seven hundred forty-three".