1056777889 has 4 divisors (see below), whose sum is σ = 1059721920. Its totient is φ = 1053833860.

The previous prime is 1056777871. The next prime is 1056777913. The reversal of 1056777889 is 9887776501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9887776501 = 2741 ⋅3607361.

It is a cyclic number.

It is not a de Polignac number, because 1056777889 - 2⁹ = 1056777377 is a prime.

It is a super-2 number, since 2×1056777889² = 2233559013358592642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056777809) 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, 1471477 + ... + 1472194.

It is an arithmetic number, because the mean of its divisors is an integer number (264930480).

Almost surely, 2^1056777889 is an apocalyptic number.

It is an amenable number.

1056777889 is a deficient number, since it is larger than the sum of its proper divisors (2944031).

1056777889 is an equidigital number, since it uses as much as digits as its factorization.

1056777889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944030.

The product of its (nonzero) digits is 5927040, while the sum is 58.

The square root of 1056777889 is about 32508.1203547667. The cubic root of 1056777889 is about 1018.5786588578.

The spelling of 1056777889 in words is "one billion, fifty-six million, seven hundred seventy-seven thousand, eight hundred eighty-nine".