139867129 has 2 divisors, whose sum is σ = 139867130. Its totient is φ = 139867128.

The previous prime is 139867103. The next prime is 139867153. The reversal of 139867129 is 921768931.

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., 95511529 + 44355600 = 9773^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 139867129 - 2⁵ = 139867097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139861129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69933564 + 69933565.

It is an arithmetic number, because the mean of its divisors is an integer number (69933565).

Almost surely, 2^139867129 is an apocalyptic number.

It is an amenable number.

139867129 is a deficient number, since it is larger than the sum of its proper divisors (1).

139867129 is an equidigital number, since it uses as much as digits as its factorization.

139867129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 139867129 is about 11826.5434087902. The cubic root of 139867129 is about 519.0850886933.

It can be divided in two parts, 13986 and 7129, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 139867129 in words is "one hundred thirty-nine million, eight hundred sixty-seven thousand, one hundred twenty-nine".