129454099 has 4 divisors (see below), whose sum is σ = 137069064. Its totient is φ = 121839136.

The previous prime is 129454063. The next prime is 129454141. The reversal of 129454099 is 990454921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 129454099 - 2¹¹ = 129452051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129154099) 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, 3807457 + ... + 3807490.

It is an arithmetic number, because the mean of its divisors is an integer number (34267266).

Almost surely, 2^129454099 is an apocalyptic number.

129454099 is a deficient number, since it is larger than the sum of its proper divisors (7614965).

129454099 is an equidigital number, since it uses as much as digits as its factorization.

129454099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7614964.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 129454099 is about 11377.7897238436. The cubic root of 129454099 is about 505.8696240625.

The spelling of 129454099 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, ninety-nine".