77712743 has 4 divisors (see below), whose sum is σ = 78119808. Its totient is φ = 77305680.

The previous prime is 77712707. The next prime is 77712751. The reversal of 77712743 is 34721777.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34721777 = 1663 ⋅20879.

It is a cyclic number.

It is not a de Polignac number, because 77712743 - 2¹⁰ = 77711719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77712697 and 77712706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77712703) 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, 203246 + ... + 203627.

It is an arithmetic number, because the mean of its divisors is an integer number (19529952).

Almost surely, 2^77712743 is an apocalyptic number.

77712743 is a deficient number, since it is larger than the sum of its proper divisors (407065).

77712743 is a wasteful number, since it uses less digits than its factorization.

77712743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407064.

The product of its digits is 57624, while the sum is 38.

The square root of 77712743 is about 8815.4831404751. The cubic root of 77712743 is about 426.7407139416.

The spelling of 77712743 in words is "seventy-seven million, seven hundred twelve thousand, seven hundred forty-three".