170920249 has 2 divisors, whose sum is σ = 170920250. Its totient is φ = 170920248.

The previous prime is 170920237. The next prime is 170920273. The reversal of 170920249 is 942029071.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120297024 + 50623225 = 10968^2 + 7115^2 .

It is an emirp because it is prime and its reverse (942029071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170920249 - 2⁷ = 170920121 is a prime.

It is not a weakly prime, because it can be changed into another prime (170920289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85460124 + 85460125.

It is an arithmetic number, because the mean of its divisors is an integer number (85460125).

Almost surely, 2^170920249 is an apocalyptic number.

It is an amenable number.

170920249 is a deficient number, since it is larger than the sum of its proper divisors (1).

170920249 is an equidigital number, since it uses as much as digits as its factorization.

170920249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 170920249 is about 13073.6471193007. The cubic root of 170920249 is about 554.9636087926.

The spelling of 170920249 in words is "one hundred seventy million, nine hundred twenty thousand, two hundred forty-nine".