129454869 has 8 divisors (see below), whose sum is σ = 178558560. Its totient is φ = 83327216.

The previous prime is 129454849. The next prime is 129454877. The reversal of 129454869 is 968454921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129454869 - 2¹² = 129450773 is a prime.

It is a super-2 number, since 2×129454869² = 33517126215614322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129454849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743907 + ... + 744080.

It is an arithmetic number, because the mean of its divisors is an integer number (22319820).

Almost surely, 2^129454869 is an apocalyptic number.

It is an amenable number.

129454869 is a deficient number, since it is larger than the sum of its proper divisors (49103691).

129454869 is a wasteful number, since it uses less digits than its factorization.

129454869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488019.

The product of its digits is 622080, while the sum is 48.

The square root of 129454869 is about 11377.8235616483. The cubic root of 129454869 is about 505.8706270405.

The spelling of 129454869 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, eight hundred sixty-nine".