129739951 has 6 divisors (see below), whose sum is σ = 142606856. Its totient is φ = 117945300.

The previous prime is 129739927. The next prime is 129739963. The reversal of 129739951 is 159937921.

It is not a de Polignac number, because 129739951 - 2¹³ = 129731759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129739451) 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 5 ways as a sum of consecutive naturals, for example, 535995 + ... + 536236.

Almost surely, 2^129739951 is an apocalyptic number.

129739951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129739951 is a deficient number, since it is larger than the sum of its proper divisors (12866905).

129739951 is a wasteful number, since it uses less digits than its factorization.

129739951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072253 (or 1072242 counting only the distinct ones).

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

The square root of 129739951 is about 11390.3446392109. The cubic root of 129739951 is about 506.2416929796.

The spelling of 129739951 in words is "one hundred twenty-nine million, seven hundred thirty-nine thousand, nine hundred fifty-one".