77309743 has 16 divisors (see below), whose sum is σ = 91339776. Its totient is φ = 64058400.

The previous prime is 77309719. The next prime is 77309773. The reversal of 77309743 is 34790377.

It is a happy number.

It is not a de Polignac number, because 77309743 - 2⁵ = 77309711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77309696 and 77309705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77309773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29130 + ... + 31672.

It is an arithmetic number, because the mean of its divisors is an integer number (5708736).

Almost surely, 2^77309743 is an apocalyptic number.

77309743 is a deficient number, since it is larger than the sum of its proper divisors (14030033).

77309743 is a wasteful number, since it uses less digits than its factorization.

77309743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 77309743 is about 8792.5959192948. The cubic root of 77309743 is about 426.0017761687.

The spelling of 77309743 in words is "seventy-seven million, three hundred nine thousand, seven hundred forty-three".