129379637 has 2 divisors, whose sum is σ = 129379638. Its totient is φ = 129379636.

The previous prime is 129379619. The next prime is 129379681. The reversal of 129379637 is 736973921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 1825201 = 11294^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 129379637 - 2⁶ = 129379573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129379591 and 129379600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129379697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64689818 + 64689819.

It is an arithmetic number, because the mean of its divisors is an integer number (64689819).

Almost surely, 2^129379637 is an apocalyptic number.

It is an amenable number.

129379637 is a deficient number, since it is larger than the sum of its proper divisors (1).

129379637 is an equidigital number, since it uses as much as digits as its factorization.

129379637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 47.

The square root of 129379637 is about 11374.5170007346. The cubic root of 129379637 is about 505.7726133878.

The spelling of 129379637 in words is "one hundred twenty-nine million, three hundred seventy-nine thousand, six hundred thirty-seven".