1010665217 has 4 divisors (see below), whose sum is σ = 1024510020. Its totient is φ = 996820416.

The previous prime is 1010665189. The next prime is 1010665219. The reversal of 1010665217 is 7125660101.

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 288184576 + 722480641 = 16976^2 + 26879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010665217 - 2⁶ = 1010665153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1010665217.

It is not an unprimeable number, because it can be changed into a prime (1010665219) 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, 6922292 + ... + 6922437.

It is an arithmetic number, because the mean of its divisors is an integer number (256127505).

Almost surely, 2^1010665217 is an apocalyptic number.

It is an amenable number.

1010665217 is a deficient number, since it is larger than the sum of its proper divisors (13844803).

1010665217 is an equidigital number, since it uses as much as digits as its factorization.

1010665217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13844802.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1010665217 is about 31790.9612468702. The cubic root of 1010665217 is about 1003.5425081506.

The spelling of 1010665217 in words is "one billion, ten million, six hundred sixty-five thousand, two hundred seventeen".