129293389 has 4 divisors (see below), whose sum is σ = 132300256. Its totient is φ = 126286524.

The previous prime is 129293383. The next prime is 129293399. The reversal of 129293389 is 983392921.

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 129293389 - 2¹³ = 129285197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129293383) 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, 1503369 + ... + 1503454.

It is an arithmetic number, because the mean of its divisors is an integer number (33075064).

Almost surely, 2^129293389 is an apocalyptic number.

It is an amenable number.

129293389 is a deficient number, since it is larger than the sum of its proper divisors (3006867).

129293389 is an equidigital number, since it uses as much as digits as its factorization.

129293389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006866.

The product of its digits is 209952, while the sum is 46.

The square root of 129293389 is about 11370.7250868183. The cubic root of 129293389 is about 505.6602011253.

The spelling of 129293389 in words is "one hundred twenty-nine million, two hundred ninety-three thousand, three hundred eighty-nine".