129073655 has 4 divisors (see below), whose sum is σ = 154888392. Its totient is φ = 103258920.

The previous prime is 129073613. The next prime is 129073687. The reversal of 129073655 is 556370921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556370921 = 2741 ⋅202981.

It is not a de Polignac number, because 129073655 - 2¹⁸ = 128811511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12907361 + ... + 12907370.

It is an arithmetic number, because the mean of its divisors is an integer number (38722098).

Almost surely, 2^129073655 is an apocalyptic number.

129073655 is a deficient number, since it is larger than the sum of its proper divisors (25814737).

129073655 is an equidigital number, since it uses as much as digits as its factorization.

129073655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25814736.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 129073655 is about 11361.0587094689. The cubic root of 129073655 is about 505.3735823400.

The spelling of 129073655 in words is "one hundred twenty-nine million, seventy-three thousand, six hundred fifty-five".