1056920869 has 2 divisors, whose sum is σ = 1056920870. Its totient is φ = 1056920868.

The previous prime is 1056920861. The next prime is 1056920899. The reversal of 1056920869 is 9680296501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853516225 + 203404644 = 29215^2 + 14262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056920869 - 2³ = 1056920861 is a prime.

It is a super-2 number, since 2×1056920869² = 2234163446655430322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056920861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528460434 + 528460435.

It is an arithmetic number, because the mean of its divisors is an integer number (528460435).

Almost surely, 2^1056920869 is an apocalyptic number.

It is an amenable number.

1056920869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056920869 is an equidigital number, since it uses as much as digits as its factorization.

1056920869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1056920869 is about 32510.3194232231. The cubic root of 1056920869 is about 1018.6245940256.

The spelling of 1056920869 in words is "one billion, fifty-six million, nine hundred twenty thousand, eight hundred sixty-nine".