129937849 has 2 divisors, whose sum is σ = 129937850. Its totient is φ = 129937848.

The previous prime is 129937837. The next prime is 129937853. The reversal of 129937849 is 948739921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 2699449 = 11280^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 129937849 - 2¹¹ = 129935801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129937796 and 129937805.

It is not a weakly prime, because it can be changed into another prime (129937949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64968924 + 64968925.

It is an arithmetic number, because the mean of its divisors is an integer number (64968925).

Almost surely, 2^129937849 is an apocalyptic number.

It is an amenable number.

129937849 is a deficient number, since it is larger than the sum of its proper divisors (1).

129937849 is an equidigital number, since it uses as much as digits as its factorization.

129937849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 129937849 is about 11399.0284235105. The cubic root of 129937849 is about 506.4989597209.

The spelling of 129937849 in words is "one hundred twenty-nine million, nine hundred thirty-seven thousand, eight hundred forty-nine".