77384691 has 12 divisors (see below), whose sum is σ = 112050120. Its totient is φ = 51464160.

The previous prime is 77384669. The next prime is 77384729. The reversal of 77384691 is 19648377.

It is not a de Polignac number, because 77384691 - 2²² = 73190387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77384291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6490 + ... + 14031.

It is an arithmetic number, because the mean of its divisors is an integer number (9337510).

Almost surely, 2^77384691 is an apocalyptic number.

77384691 is a deficient number, since it is larger than the sum of its proper divisors (34665429).

77384691 is a wasteful number, since it uses less digits than its factorization.

77384691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20946 (or 20943 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 77384691 is about 8796.8568818641. The cubic root of 77384691 is about 426.1393943088.

The spelling of 77384691 in words is "seventy-seven million, three hundred eighty-four thousand, six hundred ninety-one".