77775053 has 4 divisors (see below), whose sum is σ = 78649020. Its totient is φ = 76901088.

The previous prime is 77775023. The next prime is 77775059. The reversal of 77775053 is 35057777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35057777 = 547 ⋅64091.

It can be written as a sum of positive squares in 2 ways, for example, as 52954729 + 24820324 = 7277^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 77775053 - 2¹⁰ = 77774029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77775053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77775059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436850 + ... + 437027.

It is an arithmetic number, because the mean of its divisors is an integer number (19662255).

Almost surely, 2^77775053 is an apocalyptic number.

It is an amenable number.

77775053 is a deficient number, since it is larger than the sum of its proper divisors (873967).

77775053 is an equidigital number, since it uses as much as digits as its factorization.

77775053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873966.

The product of its (nonzero) digits is 180075, while the sum is 41.

The square root of 77775053 is about 8819.0165551494. The cubic root of 77775053 is about 426.8547368991.

The spelling of 77775053 in words is "seventy-seven million, seven hundred seventy-five thousand, fifty-three".