77699377 has 4 divisors (see below), whose sum is σ = 88799296. Its totient is φ = 66599460.

The previous prime is 77699287. The next prime is 77699383. The reversal of 77699377 is 77399677.

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: 77399677 = 41 ⋅1887797.

It is a cyclic number.

It is not a de Polignac number, because 77699377 - 2¹⁵ = 77666609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77699077) 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, 5549949 + ... + 5549962.

It is an arithmetic number, because the mean of its divisors is an integer number (22199824).

Almost surely, 2^77699377 is an apocalyptic number.

It is an amenable number.

77699377 is a deficient number, since it is larger than the sum of its proper divisors (11099919).

77699377 is a wasteful number, since it uses less digits than its factorization.

77699377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099918.

The product of its digits is 3500658, while the sum is 55.

The square root of 77699377 is about 8814.7250098911. The cubic root of 77699377 is about 426.7162471544.

The spelling of 77699377 in words is "seventy-seven million, six hundred ninety-nine thousand, three hundred seventy-seven".