1056919217 has 4 divisors (see below), whose sum is σ = 1057020660. Its totient is φ = 1056817776.

The previous prime is 1056919183. The next prime is 1056919229. The reversal of 1056919217 is 7129196501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 483604081 + 573315136 = 21991^2 + 23944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056919217 - 2¹⁰ = 1056918193 is a prime.

It is a super-2 number, since 2×1056919217² = 2234156462527786178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056919267) 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, 33038 + ... + 56615.

It is an arithmetic number, because the mean of its divisors is an integer number (264255165).

Almost surely, 2^1056919217 is an apocalyptic number.

It is an amenable number.

1056919217 is a deficient number, since it is larger than the sum of its proper divisors (101443).

1056919217 is an equidigital number, since it uses as much as digits as its factorization.

1056919217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101442.

The product of its (nonzero) digits is 34020, while the sum is 41.

The square root of 1056919217 is about 32510.2940158959. The cubic root of 1056919217 is about 1018.6240633114.

The spelling of 1056919217 in words is "one billion, fifty-six million, nine hundred nineteen thousand, two hundred seventeen".