206370139 has 2 divisors, whose sum is σ = 206370140. Its totient is φ = 206370138.

The previous prime is 206370133. The next prime is 206370161. The reversal of 206370139 is 931073602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206370139 - 2⁵ = 206370107 is a prime.

It is equal to p_11411995 and since 206370139 and 11411995 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206370139.

It is not a weakly prime, because it can be changed into another prime (206370133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103185069 + 103185070.

It is an arithmetic number, because the mean of its divisors is an integer number (103185070).

Almost surely, 2^206370139 is an apocalyptic number.

206370139 is a deficient number, since it is larger than the sum of its proper divisors (1).

206370139 is an equidigital number, since it uses as much as digits as its factorization.

206370139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 206370139 is about 14365.5887105263. The cubic root of 206370139 is about 590.9475714650.

The spelling of 206370139 in words is "two hundred six million, three hundred seventy thousand, one hundred thirty-nine".