129193451 has 2 divisors, whose sum is σ = 129193452. Its totient is φ = 129193450.

The previous prime is 129193423. The next prime is 129193469. The reversal of 129193451 is 154391921.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (154391921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129193451 - 2²⁶ = 62084587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129192451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64596725 + 64596726.

It is an arithmetic number, because the mean of its divisors is an integer number (64596726).

Almost surely, 2^129193451 is an apocalyptic number.

129193451 is a deficient number, since it is larger than the sum of its proper divisors (1).

129193451 is an equidigital number, since it uses as much as digits as its factorization.

129193451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 129193451 is about 11366.3297066379. The cubic root of 129193451 is about 505.5298833122.

The spelling of 129193451 in words is "one hundred twenty-nine million, one hundred ninety-three thousand, four hundred fifty-one".