129457797 has 8 divisors (see below), whose sum is σ = 197269056. Its totient is φ = 73975872.

The previous prime is 129457763. The next prime is 129457813. The reversal of 129457797 is 797754921.

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

It is not a de Polignac number, because 129457797 - 2⁶ = 129457733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129457597) 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 7 ways as a sum of consecutive naturals, for example, 3082308 + ... + 3082349.

It is an arithmetic number, because the mean of its divisors is an integer number (24658632).

Almost surely, 2^129457797 is an apocalyptic number.

It is an amenable number.

129457797 is a deficient number, since it is larger than the sum of its proper divisors (67811259).

129457797 is an equidigital number, since it uses as much as digits as its factorization.

129457797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164667.

The product of its digits is 1111320, while the sum is 51.

The square root of 129457797 is about 11377.9522322780. The cubic root of 129457797 is about 505.8744409257.

The spelling of 129457797 in words is "one hundred twenty-nine million, four hundred fifty-seven thousand, seven hundred ninety-seven".