1056478909 has 2 divisors, whose sum is σ = 1056478910. Its totient is φ = 1056478908.

The previous prime is 1056478877. The next prime is 1056478933. The reversal of 1056478909 is 9098746501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960380100 + 96098809 = 30990^2 + 9803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056478909 - 2⁵ = 1056478877 is a prime.

It is a super-2 number, since 2×1056478909² = 2232295370323660562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056478949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528239454 + 528239455.

It is an arithmetic number, because the mean of its divisors is an integer number (528239455).

Almost surely, 2^1056478909 is an apocalyptic number.

It is an amenable number.

1056478909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056478909 is an equidigital number, since it uses as much as digits as its factorization.

1056478909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1056478909 is about 32503.5214861405. The cubic root of 1056478909 is about 1018.4825921963.

The spelling of 1056478909 in words is "one billion, fifty-six million, four hundred seventy-eight thousand, nine hundred nine".