129119477 has 2 divisors, whose sum is σ = 129119478. Its totient is φ = 129119476.

The previous prime is 129119449. The next prime is 129119479. The reversal of 129119477 is 774911921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111218116 + 17901361 = 10546^2 + 4231^2 .

It is a cyclic number.

It is not a de Polignac number, because 129119477 - 2²² = 124925173 is a prime.

Together with 129119479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129119479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64559738 + 64559739.

It is an arithmetic number, because the mean of its divisors is an integer number (64559739).

Almost surely, 2^129119477 is an apocalyptic number.

It is an amenable number.

129119477 is a deficient number, since it is larger than the sum of its proper divisors (1).

129119477 is an equidigital number, since it uses as much as digits as its factorization.

129119477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 41.

The square root of 129119477 is about 11363.0751559602. The cubic root of 129119477 is about 505.4333789176.

The spelling of 129119477 in words is "one hundred twenty-nine million, one hundred nineteen thousand, four hundred seventy-seven".