77799485 has 4 divisors (see below), whose sum is σ = 93359388. Its totient is φ = 62239584.

The previous prime is 77799481. The next prime is 77799499. The reversal of 77799485 is 58499777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61136761 + 16662724 = 7819^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 77799485 - 2² = 77799481 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 77799485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77799481) 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, 7779944 + ... + 7779953.

It is an arithmetic number, because the mean of its divisors is an integer number (23339847).

Almost surely, 2^77799485 is an apocalyptic number.

It is an amenable number.

77799485 is a deficient number, since it is larger than the sum of its proper divisors (15559903).

77799485 is a wasteful number, since it uses less digits than its factorization.

77799485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15559902.

The product of its digits is 4445280, while the sum is 56.

The square root of 77799485 is about 8820.4016348463. The cubic root of 77799485 is about 426.8994291351.

The spelling of 77799485 in words is "seventy-seven million, seven hundred ninety-nine thousand, four hundred eighty-five".