129476423 has 2 divisors, whose sum is σ = 129476424. Its totient is φ = 129476422.

The previous prime is 129476419. The next prime is 129476441. The reversal of 129476423 is 324674921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129476423 - 2² = 129476419 is a prime.

It is a super-2 number, since 2×129476423² = 33528288225749858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129476443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64738211 + 64738212.

It is an arithmetic number, because the mean of its divisors is an integer number (64738212).

Almost surely, 2^129476423 is an apocalyptic number.

129476423 is a deficient number, since it is larger than the sum of its proper divisors (1).

129476423 is an equidigital number, since it uses as much as digits as its factorization.

129476423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 129476423 is about 11378.7707156793. The cubic root of 129476423 is about 505.8987009953.

The spelling of 129476423 in words is "one hundred twenty-nine million, four hundred seventy-six thousand, four hundred twenty-three".