129830777 has 4 divisors (see below), whose sum is σ = 129938676. Its totient is φ = 129722880.

The previous prime is 129830773. The next prime is 129830783. The reversal of 129830777 is 777038921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777038921 = 47 ⋅16532743.

It can be written as a sum of positive squares in 2 ways, for example, as 17131321 + 112699456 = 4139^2 + 10616^2 .

It is a cyclic number.

It is not a de Polignac number, because 129830777 - 2² = 129830773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129830773) 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, 52124 + ... + 54557.

It is an arithmetic number, because the mean of its divisors is an integer number (32484669).

Almost surely, 2^129830777 is an apocalyptic number.

It is an amenable number.

129830777 is a deficient number, since it is larger than the sum of its proper divisors (107899).

129830777 is a wasteful number, since it uses less digits than its factorization.

129830777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107898.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 129830777 is about 11394.3309149770. The cubic root of 129830777 is about 506.3597989349.

The spelling of 129830777 in words is "one hundred twenty-nine million, eight hundred thirty thousand, seven hundred seventy-seven".