77709743 has 2 divisors, whose sum is σ = 77709744. Its totient is φ = 77709742.

The previous prime is 77709739. The next prime is 77709767. The reversal of 77709743 is 34790777.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77709743 - 2² = 77709739 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77709694 and 77709703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77709733) 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 as a sum of consecutive naturals, namely, 38854871 + 38854872.

It is an arithmetic number, because the mean of its divisors is an integer number (38854872).

Almost surely, 2^77709743 is an apocalyptic number.

77709743 is a deficient number, since it is larger than the sum of its proper divisors (1).

77709743 is an equidigital number, since it uses as much as digits as its factorization.

77709743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259308, while the sum is 44.

The square root of 77709743 is about 8815.3129836665. The cubic root of 77709743 is about 426.7352226130.

The spelling of 77709743 in words is "seventy-seven million, seven hundred nine thousand, seven hundred forty-three".