129019293 has 12 divisors (see below), whose sum is σ = 200696860. Its totient is φ = 79396416.

The previous prime is 129019243. The next prime is 129019313. The reversal of 129019293 is 392910921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20088324 + 108930969 = 4482^2 + 10437^2 .

It is not a de Polignac number, because 129019293 - 2⁶ = 129019229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129019243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551248 + ... + 551481.

Almost surely, 2^129019293 is an apocalyptic number.

129019293 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129019293 is a deficient number, since it is larger than the sum of its proper divisors (71677567).

129019293 is a wasteful number, since it uses less digits than its factorization.

129019293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102748 (or 1102745 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 129019293 is about 11358.6659868138. The cubic root of 129019293 is about 505.3026229162.

The spelling of 129019293 in words is "one hundred twenty-nine million, nineteen thousand, two hundred ninety-three".