170203139 has 2 divisors, whose sum is σ = 170203140. Its totient is φ = 170203138.

The previous prime is 170203097. The next prime is 170203171. The reversal of 170203139 is 931302071.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170203139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (170203939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85101569 + 85101570.

It is an arithmetic number, because the mean of its divisors is an integer number (85101570).

Almost surely, 2^170203139 is an apocalyptic number.

170203139 is a deficient number, since it is larger than the sum of its proper divisors (1).

170203139 is an equidigital number, since it uses as much as digits as its factorization.

170203139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 170203139 is about 13046.1925096942. The cubic root of 170203139 is about 554.1863889514.

The spelling of 170203139 in words is "one hundred seventy million, two hundred three thousand, one hundred thirty-nine".