77608369 has 4 divisors (see below), whose sum is σ = 81693040. Its totient is φ = 73523700.

The previous prime is 77608343. The next prime is 77608381. The reversal of 77608369 is 96380677.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96380677 = 509 ⋅189353.

It is a cyclic number.

It is not a de Polignac number, because 77608369 - 2¹⁵ = 77575601 is a prime.

It is a super-2 number, since 2×77608369² = 12046117877680322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77603369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2042307 + ... + 2042344.

It is an arithmetic number, because the mean of its divisors is an integer number (20423260).

Almost surely, 2^77608369 is an apocalyptic number.

It is an amenable number.

77608369 is a deficient number, since it is larger than the sum of its proper divisors (4084671).

77608369 is a wasteful number, since it uses less digits than its factorization.

77608369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084670.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 77608369 is about 8809.5612263041. The cubic root of 77608369 is about 426.5495801630.

It can be divided in two parts, 77608 and 369, that added together give a palindrome (77977).

The spelling of 77608369 in words is "seventy-seven million, six hundred eight thousand, three hundred sixty-nine".