77687049 has 8 divisors (see below), whose sum is σ = 112999392. Its totient is φ = 47083040.

The previous prime is 77687047. The next prime is 77687053. The reversal of 77687049 is 94078677.

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 77687049 - 2¹ = 77687047 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77686989 and 77687007.

It is not an unprimeable number, because it can be changed into a prime (77687047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1177044 + ... + 1177109.

It is an arithmetic number, because the mean of its divisors is an integer number (14124924).

Almost surely, 2^77687049 is an apocalyptic number.

It is an amenable number.

77687049 is a deficient number, since it is larger than the sum of its proper divisors (35312343).

77687049 is a wasteful number, since it uses less digits than its factorization.

77687049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354167.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 77687049 is about 8814.0256977161. The cubic root of 77687049 is about 426.6936779639.

The spelling of 77687049 in words is "seventy-seven million, six hundred eighty-seven thousand, forty-nine".