77397 has 4 divisors (see below), whose sum is σ = 103200. Its totient is φ = 51596.

The previous prime is 77383. The next prime is 77417. The reversal of 77397 is 79377.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79377 = 3 ⋅26459.

It is a cyclic number.

It is not a de Polignac number, because 77397 - 2⁷ = 77269 is a prime.

It is a D-number.

77397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77317) 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, 12897 + ... + 12902.

It is an arithmetic number, because the mean of its divisors is an integer number (25800).

2⁷⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

77397 is a deficient number, since it is larger than the sum of its proper divisors (25803).

77397 is a wasteful number, since it uses less digits than its factorization.

77397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25802.

The product of its digits is 9261, while the sum is 33.

The square root of 77397 is about 278.2031631740. The cubic root of 77397 is about 42.6161987372.

It can be divided in two parts, 77 and 397, that added together give a palindrome (474).

The spelling of 77397 in words is "seventy-seven thousand, three hundred ninety-seven".