129211893 has 12 divisors (see below), whose sum is σ = 187786560. Its totient is φ = 85611816.

The previous prime is 129211889. The next prime is 129211897. The reversal of 129211893 is 398112921.

It is an interprime number because it is at equal distance from previous prime (129211889) and next prime (129211897).

It is not a de Polignac number, because 129211893 - 2² = 129211889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129211897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42573 + ... + 45506.

It is an arithmetic number, because the mean of its divisors is an integer number (15648880).

Almost surely, 2^129211893 is an apocalyptic number.

It is an amenable number.

129211893 is a deficient number, since it is larger than the sum of its proper divisors (58574667).

129211893 is a wasteful number, since it uses less digits than its factorization.

129211893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88248 (or 88245 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 129211893 is about 11367.1409334098. The cubic root of 129211893 is about 505.5539364884.

The spelling of 129211893 in words is "one hundred twenty-nine million, two hundred eleven thousand, eight hundred ninety-three".