129474929 has 4 divisors (see below), whose sum is σ = 129547776. Its totient is φ = 129402084.

The previous prime is 129474913. The next prime is 129474931. The reversal of 129474929 is 929474921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129474929 - 2⁴ = 129474913 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129474959) 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, 33689 + ... + 37334.

It is an arithmetic number, because the mean of its divisors is an integer number (32386944).

Almost surely, 2^129474929 is an apocalyptic number.

It is an amenable number.

129474929 is a deficient number, since it is larger than the sum of its proper divisors (72847).

129474929 is an equidigital number, since it uses as much as digits as its factorization.

129474929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72846.

The product of its digits is 326592, while the sum is 47.

The square root of 129474929 is about 11378.7050669222. The cubic root of 129474929 is about 505.8967551698.

The spelling of 129474929 in words is "one hundred twenty-nine million, four hundred seventy-four thousand, nine hundred twenty-nine".