78604577 has 4 divisors (see below), whose sum is σ = 82741680. Its totient is φ = 74467476.

The previous prime is 78604571. The next prime is 78604607. The reversal of 78604577 is 77540687.

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.

It is a cyclic number.

It is not a de Polignac number, because 78604577 - 2⁸ = 78604321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78604571) 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, 2068523 + ... + 2068560.

It is an arithmetic number, because the mean of its divisors is an integer number (20685420).

Almost surely, 2^78604577 is an apocalyptic number.

It is an amenable number.

78604577 is a deficient number, since it is larger than the sum of its proper divisors (4137103).

78604577 is a wasteful number, since it uses less digits than its factorization.

78604577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137102.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 78604577 is about 8865.9222306537. The cubic root of 78604577 is about 428.3669390110.

The spelling of 78604577 in words is "seventy-eight million, six hundred four thousand, five hundred seventy-seven".