129743737 has 2 divisors, whose sum is σ = 129743738. Its totient is φ = 129743736.

The previous prime is 129743729. The next prime is 129743741. The reversal of 129743737 is 737347921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94945536 + 34798201 = 9744^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 129743737 - 2³ = 129743729 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 129743693 and 129743702.

It is not a weakly prime, because it can be changed into another prime (129743777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64871868 + 64871869.

It is an arithmetic number, because the mean of its divisors is an integer number (64871869).

Almost surely, 2^129743737 is an apocalyptic number.

It is an amenable number.

129743737 is a deficient number, since it is larger than the sum of its proper divisors (1).

129743737 is an equidigital number, since it uses as much as digits as its factorization.

129743737 is an evil number, because the sum of its binary digits is even.

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

The square root of 129743737 is about 11390.5108313894. The cubic root of 129743737 is about 506.2466172207.

The spelling of 129743737 in words is "one hundred twenty-nine million, seven hundred forty-three thousand, seven hundred thirty-seven".