1055689777 has 4 divisors (see below), whose sum is σ = 1056913920. Its totient is φ = 1054465636.

The previous prime is 1055689753. The next prime is 1055689781. The reversal of 1055689777 is 7779865501.

It is a happy number.

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: 7779865501 = 3821 ⋅2036081.

It is a cyclic number.

It is not a de Polignac number, because 1055689777 - 2²⁷ = 921472049 is a prime.

It is a super-2 number, since 2×1055689777² = 2228961810524619458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055689727) 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, 610777 + ... + 612502.

It is an arithmetic number, because the mean of its divisors is an integer number (264228480).

Almost surely, 2^1055689777 is an apocalyptic number.

It is an amenable number.

1055689777 is a deficient number, since it is larger than the sum of its proper divisors (1224143).

1055689777 is an equidigital number, since it uses as much as digits as its factorization.

1055689777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224142.

The product of its (nonzero) digits is 3704400, while the sum is 55.

The square root of 1055689777 is about 32491.3800414818. The cubic root of 1055689777 is about 1018.2289454230.

The spelling of 1055689777 in words is "one billion, fifty-five million, six hundred eighty-nine thousand, seven hundred seventy-seven".