129457393 has 8 divisors (see below), whose sum is σ = 146753600. Its totient is φ = 113209488.

The previous prime is 129457369. The next prime is 129457399. The reversal of 129457393 is 393754921.

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

It is a cyclic number.

It is not a de Polignac number, because 129457393 - 2⁹ = 129456881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129457399) 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, 261813 + ... + 262306.

It is an arithmetic number, because the mean of its divisors is an integer number (18344200).

Almost surely, 2^129457393 is an apocalyptic number.

129457393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129457393 is a deficient number, since it is larger than the sum of its proper divisors (17296207).

129457393 is a wasteful number, since it uses less digits than its factorization.

129457393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524151.

The product of its digits is 204120, while the sum is 43.

The square root of 129457393 is about 11377.9344786301. The cubic root of 129457393 is about 505.8739146964.

The spelling of 129457393 in words is "one hundred twenty-nine million, four hundred fifty-seven thousand, three hundred ninety-three".