77311689 has 16 divisors (see below), whose sum is σ = 126870912. Its totient is φ = 40779648.

The previous prime is 77311681. The next prime is 77311739. The reversal of 77311689 is 98611377.

77311689 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 77311689 - 2³ = 77311681 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77311689.

It is not an unprimeable number, because it can be changed into a prime (77311681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141324 + ... + 141869.

It is an arithmetic number, because the mean of its divisors is an integer number (7929432).

Almost surely, 2^77311689 is an apocalyptic number.

It is an amenable number.

77311689 is a deficient number, since it is larger than the sum of its proper divisors (49559223).

77311689 is a wasteful number, since it uses less digits than its factorization.

77311689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283216.

The product of its digits is 63504, while the sum is 42.

The square root of 77311689 is about 8792.7065798877. The cubic root of 77311689 is about 426.0053505026.

The spelling of 77311689 in words is "seventy-seven million, three hundred eleven thousand, six hundred eighty-nine".