76347729 has 6 divisors (see below), whose sum is σ = 110280066. Its totient is φ = 50898480.

The previous prime is 76347727. The next prime is 76347737. The reversal of 76347729 is 92774367.

It is a happy number.

76347729 is a `hidden beast` number, since 7 + 634 + 7 + 7 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38192400 + 38155329 = 6180^2 + 6177^2 .

It is not a de Polignac number, because 76347729 - 2¹ = 76347727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76347721) 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 5 ways as a sum of consecutive naturals, for example, 4241532 + ... + 4241549.

It is an arithmetic number, because the mean of its divisors is an integer number (18380011).

Almost surely, 2^76347729 is an apocalyptic number.

It is an amenable number.

76347729 is a deficient number, since it is larger than the sum of its proper divisors (33932337).

76347729 is a wasteful number, since it uses less digits than its factorization.

76347729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483087 (or 8483084 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 76347729 is about 8737.7187526265. The cubic root of 76347729 is about 424.2273926375.

The spelling of 76347729 in words is "seventy-six million, three hundred forty-seven thousand, seven hundred twenty-nine".