77605133 has 4 divisors (see below), whose sum is σ = 77927388. Its totient is φ = 77282880.

The previous prime is 77605127. The next prime is 77605147. The reversal of 77605133 is 33150677.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26081449 + 51523684 = 5107^2 + 7178^2 .

It is a cyclic number.

It is not a de Polignac number, because 77605133 - 2⁴ = 77605117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77605133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77605193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160766 + ... + 161247.

It is an arithmetic number, because the mean of its divisors is an integer number (19481847).

Almost surely, 2^77605133 is an apocalyptic number.

It is an amenable number.

77605133 is a deficient number, since it is larger than the sum of its proper divisors (322255).

77605133 is a wasteful number, since it uses less digits than its factorization.

77605133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322254.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 77605133 is about 8809.3775603047. The cubic root of 77605133 is about 426.5436515342.

The spelling of 77605133 in words is "seventy-seven million, six hundred five thousand, one hundred thirty-three".