77321319 has 8 divisors (see below), whose sum is σ = 104158320. Its totient is φ = 51015936.

The previous prime is 77321311. The next prime is 77321339. The reversal of 77321319 is 91312377.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77321319 - 2³ = 77321311 is a prime.

It is a super-2 number, since 2×77321319² = 11957172743799522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77321319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77321311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132564 + ... + 133145.

It is an arithmetic number, because the mean of its divisors is an integer number (13019790).

Almost surely, 2^77321319 is an apocalyptic number.

77321319 is a deficient number, since it is larger than the sum of its proper divisors (26837001).

77321319 is a wasteful number, since it uses less digits than its factorization.

77321319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265809.

The product of its digits is 7938, while the sum is 33.

The square root of 77321319 is about 8793.2541757873. The cubic root of 77321319 is about 426.0230376133.

The spelling of 77321319 in words is "seventy-seven million, three hundred twenty-one thousand, three hundred nineteen".