129383385 has 8 divisors (see below), whose sum is σ = 207013440. Its totient is φ = 69004464.

The previous prime is 129383383. The next prime is 129383389. The reversal of 129383385 is 583383921.

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

It is not a de Polignac number, because 129383385 - 2¹ = 129383383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129383383) 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, 4312765 + ... + 4312794.

It is an arithmetic number, because the mean of its divisors is an integer number (25876680).

Almost surely, 2^129383385 is an apocalyptic number.

129383385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129383385 is a deficient number, since it is larger than the sum of its proper divisors (77630055).

129383385 is an equidigital number, since it uses as much as digits as its factorization.

129383385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625567.

The product of its digits is 155520, while the sum is 42.

The square root of 129383385 is about 11374.6817537899. The cubic root of 129383385 is about 505.7774972513. Note that the first 3 decimals are identical.

The spelling of 129383385 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, three hundred eighty-five".