1012866817 has 16 divisors (see below), whose sum is σ = 1085270400. Its totient is φ = 941960448.

The previous prime is 1012866797. The next prime is 1012866889. The reversal of 1012866817 is 7186682101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012866817 is a prime.

It is a super-2 number, since 2×1012866817² = 2051798377959422978, which contains 22 as substring.

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 1012866817.

It is not an unprimeable number, because it can be changed into a prime (1012866017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530178 + ... + 532084.

It is an arithmetic number, because the mean of its divisors is an integer number (67829400).

Almost surely, 2^1012866817 is an apocalyptic number.

1012866817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1012866817 is a deficient number, since it is larger than the sum of its proper divisors (72403583).

1012866817 is a wasteful number, since it uses less digits than its factorization.

1012866817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1012866817 is about 31825.5686045041. The cubic root of 1012866817 is about 1004.2706743766.

The spelling of 1012866817 in words is "one billion, twelve million, eight hundred sixty-six thousand, eight hundred seventeen".