77130533 has 4 divisors (see below), whose sum is σ = 79215180. Its totient is φ = 75045888.

The previous prime is 77130527. The next prime is 77130577. The reversal of 77130533 is 33503177.

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 64754209 + 12376324 = 8047^2 + 3518^2 .

It is a cyclic number.

It is not a de Polignac number, because 77130533 - 2¹⁰ = 77129509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77130496 and 77130505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77130503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042268 + ... + 1042341.

It is an arithmetic number, because the mean of its divisors is an integer number (19803795).

Almost surely, 2^77130533 is an apocalyptic number.

It is an amenable number.

77130533 is a deficient number, since it is larger than the sum of its proper divisors (2084647).

77130533 is a wasteful number, since it uses less digits than its factorization.

77130533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084646.

The product of its (nonzero) digits is 6615, while the sum is 29.

The square root of 77130533 is about 8782.3990458189. The cubic root of 77130533 is about 425.6723530727.

The spelling of 77130533 in words is "seventy-seven million, one hundred thirty thousand, five hundred thirty-three".