70139 has 2 divisors, whose sum is σ = 70140. Its totient is φ = 70138.

The previous prime is 70123. The next prime is 70141. The reversal of 70139 is 93107.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70139 - 2⁴ = 70123 is a prime.

Together with 70141, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₆₉₅₀ and since 70139 and 6950 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 70139.

It is not a weakly prime, because it can be changed into another prime (70199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35069 + 35070.

It is an arithmetic number, because the mean of its divisors is an integer number (35070).

2⁷⁰¹³⁹ is an apocalyptic number.

70139 is a deficient number, since it is larger than the sum of its proper divisors (1).

70139 is an equidigital number, since it uses as much as digits as its factorization.

70139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 70139 is about 264.8376861400. The cubic root of 70139 is about 41.2401139455.

It can be divided in two parts, 70 and 139, that multiplied together give a triangular number (9730 = T₁₃₉).

The spelling of 70139 in words is "seventy thousand, one hundred thirty-nine".