129699361 has 4 divisors (see below), whose sum is σ = 141490224. Its totient is φ = 117908500.

The previous prime is 129699343. The next prime is 129699373. The reversal of 129699361 is 163996921.

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: 163996921 = 11 ⋅14908811.

It is a cyclic number.

It is not a de Polignac number, because 129699361 - 2⁵ = 129699329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129699331) 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, 5895415 + ... + 5895436.

It is an arithmetic number, because the mean of its divisors is an integer number (35372556).

Almost surely, 2^129699361 is an apocalyptic number.

129699361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129699361 is a deficient number, since it is larger than the sum of its proper divisors (11790863).

129699361 is a wasteful number, since it uses less digits than its factorization.

129699361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11790862.

The product of its digits is 157464, while the sum is 46.

The square root of 129699361 is about 11388.5627275789. The cubic root of 129699361 is about 506.1888937880.

The spelling of 129699361 in words is "one hundred twenty-nine million, six hundred ninety-nine thousand, three hundred sixty-one".