77324399 has 4 divisors (see below), whose sum is σ = 77483664. Its totient is φ = 77165136.

The previous prime is 77324383. The next prime is 77324419. The reversal of 77324399 is 99342377.

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

It is a cyclic number.

It is not a de Polignac number, because 77324399 - 2⁴ = 77324383 is a prime.

It is a super-2 number, since 2×77324399² = 11958125361422402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77324309) 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, 78902 + ... + 79875.

It is an arithmetic number, because the mean of its divisors is an integer number (19370916).

Almost surely, 2^77324399 is an apocalyptic number.

77324399 is a deficient number, since it is larger than the sum of its proper divisors (159265).

77324399 is a wasteful number, since it uses less digits than its factorization.

77324399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159264.

The product of its digits is 285768, while the sum is 44.

The square root of 77324399 is about 8793.4293082961. The cubic root of 77324399 is about 426.0286942401.

The spelling of 77324399 in words is "seventy-seven million, three hundred twenty-four thousand, three hundred ninety-nine".