77689601 has 4 divisors (see below), whose sum is σ = 84752304. Its totient is φ = 70626900.

The previous prime is 77689589. The next prime is 77689663. The reversal of 77689601 is 10698677.

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 77689601 - 2¹⁴ = 77673217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77680601) 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, 3531335 + ... + 3531356.

It is an arithmetic number, because the mean of its divisors is an integer number (21188076).

Almost surely, 2^77689601 is an apocalyptic number.

It is an amenable number.

77689601 is a deficient number, since it is larger than the sum of its proper divisors (7062703).

77689601 is a wasteful number, since it uses less digits than its factorization.

77689601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062702.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 77689601 is about 8814.1704657897. The cubic root of 77689601 is about 426.6983501727.

The spelling of 77689601 in words is "seventy-seven million, six hundred eighty-nine thousand, six hundred one".