129473737 has 2 divisors, whose sum is σ = 129473738. Its totient is φ = 129473736.

The previous prime is 129473713. The next prime is 129473761. The reversal of 129473737 is 737374921.

It is a balanced prime because it is at equal distance from previous prime (129473713) and next prime (129473761).

It can be written as a sum of positive squares in only one way, i.e., 127667401 + 1806336 = 11299^2 + 1344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129473737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129473693 and 129473702.

It is not a weakly prime, because it can be changed into another prime (129473237) 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 as a sum of consecutive naturals, namely, 64736868 + 64736869.

It is an arithmetic number, because the mean of its divisors is an integer number (64736869).

Almost surely, 2^129473737 is an apocalyptic number.

It is an amenable number.

129473737 is a deficient number, since it is larger than the sum of its proper divisors (1).

129473737 is an equidigital number, since it uses as much as digits as its factorization.

129473737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 43.

The square root of 129473737 is about 11378.6526882580. The cubic root of 129473737 is about 505.8952026665.

It can be divided in two parts, 12 and 9473737, that added together give a palindrome (9473749).

The spelling of 129473737 in words is "one hundred twenty-nine million, four hundred seventy-three thousand, seven hundred thirty-seven".