77419085 has 4 divisors (see below), whose sum is σ = 92902908. Its totient is φ = 61935264.

The previous prime is 77419063. The next prime is 77419087. The reversal of 77419085 is 58091477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58091477 = 107 ⋅542911.

It can be written as a sum of positive squares in 2 ways, for example, as 41190724 + 36228361 = 6418^2 + 6019^2 .

It is a cyclic number.

It is not a de Polignac number, because 77419085 - 2⁶ = 77419021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77419087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7741904 + ... + 7741913.

It is an arithmetic number, because the mean of its divisors is an integer number (23225727).

Almost surely, 2^77419085 is an apocalyptic number.

It is an amenable number.

77419085 is a deficient number, since it is larger than the sum of its proper divisors (15483823).

77419085 is a wasteful number, since it uses less digits than its factorization.

77419085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15483822.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 77419085 is about 8798.8115674789. The cubic root of 77419085 is about 426.2025181958.

The spelling of 77419085 in words is "seventy-seven million, four hundred nineteen thousand, eighty-five".