129698459 has 4 divisors (see below), whose sum is σ = 141489240. Its totient is φ = 117907680.

The previous prime is 129698453. The next prime is 129698467. The reversal of 129698459 is 954896921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954896921 = 11 ⋅86808811.

It is not a de Polignac number, because 129698459 - 2¹² = 129694363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129698459.

It is not an unprimeable number, because it can be changed into a prime (129698453) 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, 5895374 + ... + 5895395.

It is an arithmetic number, because the mean of its divisors is an integer number (35372310).

Almost surely, 2^129698459 is an apocalyptic number.

129698459 is a deficient number, since it is larger than the sum of its proper divisors (11790781).

129698459 is a wasteful number, since it uses less digits than its factorization.

129698459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11790780.

The product of its digits is 1399680, while the sum is 53.

The square root of 129698459 is about 11388.5231263760. The cubic root of 129698459 is about 506.1877203475.

The spelling of 129698459 in words is "one hundred twenty-nine million, six hundred ninety-eight thousand, four hundred fifty-nine".