129076477 has 4 divisors (see below), whose sum is σ = 133527420. Its totient is φ = 124625536.

The previous prime is 129076439. The next prime is 129076489. The reversal of 129076477 is 774670921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774670921 = 151 ⋅5130271.

It can be written as a sum of positive squares in 2 ways, for example, as 73633561 + 55442916 = 8581^2 + 7446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129076477 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 (129076417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2225428 + ... + 2225485.

It is an arithmetic number, because the mean of its divisors is an integer number (33381855).

Almost surely, 2^129076477 is an apocalyptic number.

It is an amenable number.

129076477 is a deficient number, since it is larger than the sum of its proper divisors (4450943).

129076477 is an equidigital number, since it uses as much as digits as its factorization.

129076477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450942.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 129076477 is about 11361.1829049620. The cubic root of 129076477 is about 505.3772653892.

The spelling of 129076477 in words is "one hundred twenty-nine million, seventy-six thousand, four hundred seventy-seven".