129920095 has 4 divisors (see below), whose sum is σ = 155904120. Its totient is φ = 103936072.

The previous prime is 129920093. The next prime is 129920107. The reversal of 129920095 is 590029921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 590029921 = 13 ⋅45386917.

It is a cyclic number.

It is not a de Polignac number, because 129920095 - 2¹ = 129920093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129920093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12992005 + ... + 12992014.

It is an arithmetic number, because the mean of its divisors is an integer number (38976030).

Almost surely, 2^129920095 is an apocalyptic number.

129920095 is a deficient number, since it is larger than the sum of its proper divisors (25984025).

129920095 is an equidigital number, since it uses as much as digits as its factorization.

129920095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25984024.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 129920095 is about 11398.2496463273. The cubic root of 129920095 is about 506.4758902504.

The spelling of 129920095 in words is "one hundred twenty-nine million, nine hundred twenty thousand, ninety-five".