129977459 has 4 divisors (see below), whose sum is σ = 131127816. Its totient is φ = 128827104.

The previous prime is 129977453. The next prime is 129977467. The reversal of 129977459 is 954779921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954779921 = 73 ⋅13079177.

It is a cyclic number.

It is not a de Polignac number, because 129977459 - 2⁴ = 129977443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129977459.

It is not an unprimeable number, because it can be changed into a prime (129977453) 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, 575009 + ... + 575234.

It is an arithmetic number, because the mean of its divisors is an integer number (32781954).

Almost surely, 2^129977459 is an apocalyptic number.

129977459 is a deficient number, since it is larger than the sum of its proper divisors (1150357).

129977459 is a wasteful number, since it uses less digits than its factorization.

129977459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150356.

The product of its digits is 1428840, while the sum is 53.

The square root of 129977459 is about 11400.7657198979. The cubic root of 129977459 is about 506.5504212098.

The spelling of 129977459 in words is "one hundred twenty-nine million, nine hundred seventy-seven thousand, four hundred fifty-nine".