76129749 has 6 divisors (see below), whose sum is σ = 109965206. Its totient is φ = 50753160.

The previous prime is 76129741. The next prime is 76129759. The reversal of 76129749 is 94792167.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 5267025 = 8418^2 + 2295^2 .

It is not a de Polignac number, because 76129749 - 2³ = 76129741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76129741) 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, 4229422 + ... + 4229439.

Almost surely, 2^76129749 is an apocalyptic number.

It is an amenable number.

76129749 is a deficient number, since it is larger than the sum of its proper divisors (33835457).

76129749 is a wasteful number, since it uses less digits than its factorization.

76129749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8458867 (or 8458864 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 76129749 is about 8725.2363291776. The cubic root of 76129749 is about 423.8232713249.

The spelling of 76129749 in words is "seventy-six million, one hundred twenty-nine thousand, seven hundred forty-nine".