77896649 has 8 divisors (see below), whose sum is σ = 78888768. Its totient is φ = 76911120.

The previous prime is 77896633. The next prime is 77896657. The reversal of 77896649 is 94669877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77896649 - 2⁴ = 77896633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77896594 and 77896603.

It is not an unprimeable number, because it can be changed into a prime (77899649) 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 7 ways as a sum of consecutive naturals, for example, 24734 + ... + 27704.

It is an arithmetic number, because the mean of its divisors is an integer number (9861096).

Almost surely, 2^77896649 is an apocalyptic number.

It is an amenable number.

77896649 is a deficient number, since it is larger than the sum of its proper divisors (992119).

77896649 is a wasteful number, since it uses less digits than its factorization.

77896649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295.

The product of its digits is 4572288, while the sum is 56.

The square root of 77896649 is about 8825.9078286599. The cubic root of 77896649 is about 427.0770738426.

The spelling of 77896649 in words is "seventy-seven million, eight hundred ninety-six thousand, six hundred forty-nine".