129026537 has 2 divisors, whose sum is σ = 129026538. Its totient is φ = 129026536.

The previous prime is 129026533. The next prime is 129026543. The reversal of 129026537 is 735620921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 31629376 = 9869^2 + 5624^2 .

It is a cyclic number.

It is not a de Polignac number, because 129026537 - 2² = 129026533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129026497 and 129026506.

It is not a weakly prime, because it can be changed into another prime (129026533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64513268 + 64513269.

It is an arithmetic number, because the mean of its divisors is an integer number (64513269).

Almost surely, 2^129026537 is an apocalyptic number.

It is an amenable number.

129026537 is a deficient number, since it is larger than the sum of its proper divisors (1).

129026537 is an equidigital number, since it uses as much as digits as its factorization.

129026537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 129026537 is about 11358.9848578119. The cubic root of 129026537 is about 505.3120797543.

The spelling of 129026537 in words is "one hundred twenty-nine million, twenty-six thousand, five hundred thirty-seven".