129422797 has 4 divisors (see below), whose sum is σ = 147911776. Its totient is φ = 110933820.

The previous prime is 129422791. The next prime is 129422801. The reversal of 129422797 is 797224921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 797224921 = 61 ⋅13069261.

It is a cyclic number.

It is not a de Polignac number, because 129422797 - 2³ = 129422789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129422791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9244479 + ... + 9244492.

It is an arithmetic number, because the mean of its divisors is an integer number (36977944).

Almost surely, 2^129422797 is an apocalyptic number.

It is an amenable number.

129422797 is a deficient number, since it is larger than the sum of its proper divisors (18488979).

129422797 is an equidigital number, since it uses as much as digits as its factorization.

129422797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18488978.

The product of its digits is 127008, while the sum is 43.

The square root of 129422797 is about 11376.4140659524. The cubic root of 129422797 is about 505.8288476856.

The spelling of 129422797 in words is "one hundred twenty-nine million, four hundred twenty-two thousand, seven hundred ninety-seven".