129731043 has 16 divisors (see below), whose sum is σ = 190615040. Its totient is φ = 77976864.

The previous prime is 129731027. The next prime is 129731051. The reversal of 129731043 is 340137921.

It is not a de Polignac number, because 129731043 - 2⁴ = 129731027 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 129731043.

It is not an unprimeable number, because it can be changed into a prime (129731083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37003 + ... + 40356.

It is an arithmetic number, because the mean of its divisors is an integer number (11913440).

Almost surely, 2^129731043 is an apocalyptic number.

129731043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129731043 is a deficient number, since it is larger than the sum of its proper divisors (60883997).

129731043 is a wasteful number, since it uses less digits than its factorization.

129731043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77418.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 129731043 is about 11389.9535995543. The cubic root of 129731043 is about 506.2301064580.

Adding to 129731043 its reverse (340137921), we get a palindrome (469868964).

The spelling of 129731043 in words is "one hundred twenty-nine million, seven hundred thirty-one thousand, forty-three".