170390685349 has 2 divisors, whose sum is σ = 170390685350. Its totient is φ = 170390685348.

The previous prime is 170390685343. The next prime is 170390685419. The reversal of 170390685349 is 943586093071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106891725249 + 63498960100 = 326943^2 + 251990^2 .

It is a cyclic number.

It is not a de Polignac number, because 170390685349 - 2⁷ = 170390685221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 170390685349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170390685343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85195342674 + 85195342675.

It is an arithmetic number, because the mean of its divisors is an integer number (85195342675).

Almost surely, 2^170390685349 is an apocalyptic number.

It is an amenable number.

170390685349 is a deficient number, since it is larger than the sum of its proper divisors (1).

170390685349 is an equidigital number, since it uses as much as digits as its factorization.

170390685349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 170390685349 in words is "one hundred seventy billion, three hundred ninety million, six hundred eighty-five thousand, three hundred forty-nine".