77320533 has 4 divisors (see below), whose sum is σ = 103094048. Its totient is φ = 51547020.

The previous prime is 77320531. The next prime is 77320561. The reversal of 77320533 is 33502377.

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.

It is not a de Polignac number, because 77320533 - 2¹ = 77320531 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 77320533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77320531) 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, 12886753 + ... + 12886758.

It is an arithmetic number, because the mean of its divisors is an integer number (25773512).

Almost surely, 2^77320533 is an apocalyptic number.

It is an amenable number.

77320533 is a deficient number, since it is larger than the sum of its proper divisors (25773515).

77320533 is a wasteful number, since it uses less digits than its factorization.

77320533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25773514.

The product of its (nonzero) digits is 13230, while the sum is 30.

The square root of 77320533 is about 8793.2094823221. The cubic root of 77320533 is about 426.0215940474.

The spelling of 77320533 in words is "seventy-seven million, three hundred twenty thousand, five hundred thirty-three".