102070217 has 4 divisors (see below), whose sum is σ = 102104340. Its totient is φ = 102036096.

The previous prime is 102070207. The next prime is 102070237. The reversal of 102070217 is 712070201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90706576 + 11363641 = 9524^2 + 3371^2 .

It is a cyclic number.

It is not a de Polignac number, because 102070217 - 2⁴ = 102070201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102070207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12092 + ... + 18717.

It is an arithmetic number, because the mean of its divisors is an integer number (25526085).

Almost surely, 2^102070217 is an apocalyptic number.

It is an amenable number.

102070217 is a deficient number, since it is larger than the sum of its proper divisors (34123).

102070217 is an equidigital number, since it uses as much as digits as its factorization.

102070217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34122.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 102070217 is about 10102.9805998032. The cubic root of 102070217 is about 467.3400629179.

The spelling of 102070217 in words is "one hundred two million, seventy thousand, two hundred seventeen".