129897433 has 4 divisors (see below), whose sum is σ = 136734160. Its totient is φ = 123060708.

The previous prime is 129897431. The next prime is 129897457. The reversal of 129897433 is 334798921.

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 129897433 - 2¹ = 129897431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129897431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418335 + ... + 3418372.

It is an arithmetic number, because the mean of its divisors is an integer number (34183540).

Almost surely, 2^129897433 is an apocalyptic number.

It is an amenable number.

129897433 is a deficient number, since it is larger than the sum of its proper divisors (6836727).

129897433 is an equidigital number, since it uses as much as digits as its factorization.

129897433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836726.

The product of its digits is 326592, while the sum is 46.

The square root of 129897433 is about 11397.2555029709. The cubic root of 129897433 is about 506.4464402923.

The spelling of 129897433 in words is "one hundred twenty-nine million, eight hundred ninety-seven thousand, four hundred thirty-three".