129953791 has 8 divisors (see below), whose sum is σ = 141965568. Its totient is φ = 117975000.

The previous prime is 129953779. The next prime is 129953801. The reversal of 129953791 is 197359921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129953791 - 2¹¹ = 129951743 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129993791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 16126.

It is an arithmetic number, because the mean of its divisors is an integer number (17745696).

Almost surely, 2^129953791 is an apocalyptic number.

129953791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129953791 is a deficient number, since it is larger than the sum of its proper divisors (12011777).

129953791 is a wasteful number, since it uses less digits than its factorization.

129953791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16493.

The product of its digits is 153090, while the sum is 46.

The square root of 129953791 is about 11399.7276721859. The cubic root of 129953791 is about 506.5196728959.

The spelling of 129953791 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, seven hundred ninety-one".